Hello!
Some of you maybe have seen my PM5-3 and PM6-4 thread so maybe you guys reqognize me ^^v. Anyway 13/3 my team decided to finish CoP and we all were on PM8-1 and below here I'll try to explain my experience.
Party:
Fullmoon: PLD/WAR
Iceflare: THF/NIN
Ghil: SMN/WHM
Angeltaru: BLM/RDM
Harghanet: BLM/RDM
Enjel: WHM/BLM
PM8-1 isnt that hard, you just have to run around Al'Taieu. You start zone in via Sealion's Den and from there run north to the bridge and touch the Crystal Field to get CS and start PM8-1 and after that you have to check the towers at West, East, and South towers to pop NM.
Each tower pop 3 NM's. They can 2h, but easiest way to kill them is to let BLM Sleepga the NM's. I had 2 BLM's in my team and they got resisted, so they used Elemental+Sleepga II to sleep them. Maybe the BLM's in my team havent cap Dark Magic skill but I'm not sure, from that point of view I say the mobs have high resistance against sleepga. So basically take one by one and BLM's keep the NM's asleep while you focus on one.
A tip is dont let the mages rest to far away down the bridge, because there are sharks swimming around and can aggro, one of our BLM's aggro the sharks like twice even if we gave him a warning =P
Each tower you have to touch the crystal to pop NM, after you killed them, touch them again to get CS. You repeat same process on all 3 towers, after you done you run to the center bridge where you touched the Crystal Field to activate PM8-1 but this time you zone into Grand Palace of Hu'Xzoi and you finish PM8-1.

When you are inside Grand Palace of Hu'Xzoi keep running north and touch the gate. You'll get a CS and Tavnazian Ring (Very good ring that got unlimited usage so you can teleport to Tavnazian Safehold) after that take the east door to get another cutscene and start PM8-2.
PM8-2 isnt hard if everyone is focued, it's just time consuming. Basically you gonna run your way up to 2nd floor to fight a NM. And on your way up there are gates that you cant open so you need to touch a panel nearby the gate to call a NPC which is a sphere with it you can go trough doors. So basically escort the spheres trough doors and repeat that to your way up to 2nd floor and fight NM.
The NM got 4 shapes, Ball (BLM), Bird (THF), Spider (WAR), Human (PLD). Basically treat this NM as an EXP mob with alot of HP that's all. The only thing we notice that was a bit annoying was when the NM was in Ball form and started to cast -GA spells. The NM can also do 2H so you guys also should know what type of 2H ability. Depends on which shape it's on though.
After you defeated the NM you touch the gate where you pop NM at first time to get CS. After that escape out and run back in to Grand Palace of Hu'Xzoi and trough the north door to start PM8-3 and you are now in The Garden of Ru'Hmet.

When you are inside The Garden of Ru'Hmet you will get cutscene and after cutscene you have 3 things to do on PM8-3.
1. Everyone need to climb up their respective towers that represent their own races. Each tower has 4 floors and as always at the top you get what you want the key item. (I forgot order of the tower, but check out any website for map) You dont have to climb all towers just the tower that represent you race. You can solo this if you want to.
2. After everyone got their key items after each tower everyone need to get 2 other key items which is Dawn and Twiligt key item (Forgot the exactly name). You basically run around and find them. (Check any website for map)
3. The PM8-3 pot BC contains 2x BLM and 2x RDM
Basically for the fight PLD engage all 4, BLM ES+Sleepga II (It's a must with Elemental Seal or else you waste a sleepga).
Sleepga order: BLM, BLM, WHM
Those with elemental seal and sleepga can sleep the pots. And our WHM landed his sleepga with elemental seal. We main focus on one blm and kill it ASAP and moved on to 2nd BLM and kill it ASAP. It's very important that BLM time the sleep spells because as soon the they wake up especially the BLM they will cast -ga which hurts alot.
We killed 2x BLM pretty fast and aimed for one of the RDM's and tried to do as much dmg as possible before we whipe. We brought it down to 34% before everyone whipe. We raised up again and repated the same progress and won the BC.
BLM pots are the danger part. If you have killed either 1 or 2 BLM and then whipe you are pretty gurantee a win. After the BC you zone out on other side of the BC and keep running north to get CS and finish PM8-3 and reward: A cool CS

After CS, escape out to Al'Taieu to trigger another CS and PM8-4. Now this one is pretty easy (the way to BC lol). Basically run in to Grand Palace of Hu'Xzoi and keep running north to zone into The Garden of Ru'Hmet, and keep run north till you reach an elevator. It will ask you if you want to Ascend or Descend. According to CS Promathia is in lower part of the palace so I guess discent.
Down there you enter a very nice small area called Empyreal Paradox. Take your chance to take a group screenshot =)

When you are ready enter the BC and prepare for your final battle=). Basically first form is easy. I let the THF tank, duo he got utsusemi and can dodge "Comet" cast by Promathia. So after 1st form is down you are rdy for 2nd form.
This one is a bit more tricky, he cast "Meteor" instead of "Comet" which is -ga spells, he also put up some elemental rings behind him.
Green Rings = Magic Shield
Red Rings = Psycial Shield
None = No shield
We decided to let the THF and Prishe duo Promathia, cant believe it huh? Both NPC are smart, Prishe is MNK/WHM she can use both 2h so take advantage of it and if you keep her alive you can basically let her tank. And the other one, forgot his name, something with Sel something he can Stun Promathia by casting some light lances (reminds me about starwars). Promathia pretty much stand still for a bit so our BLM's took the advantage to nuke him.
Remember when you finish 1st form and you gonna fight him on 2nd form. Dont engage him. You'll have like 3 min to med up before Prishe and the other dude engage Promathia =).

After you defeated Promathia you are basically done with CoP and wait for a new JP day to trigger some CS's around Vana'Diel and shortly after that you get your reward.
A tip, some people just get their ring and doesnt bother to trigger the two last cutscenes, I strongly recmond you do it because the last cutscene is awesome if you compare it with ZM ending.
Anyway thanks for your patient reading trough all this I hope you guys enjoy CoP as much as my CoP-Team did.
Takke.
Some of you maybe have seen my PM5-3 and PM6-4 thread so maybe you guys reqognize me ^^v. Anyway 13/3 my team decided to finish CoP and we all were on PM8-1 and below here I'll try to explain my experience.
Party:
Fullmoon: PLD/WAR
Iceflare: THF/NIN
Ghil: SMN/WHM
Angeltaru: BLM/RDM
Harghanet: BLM/RDM
Enjel: WHM/BLM
PM8-1 isnt that hard, you just have to run around Al'Taieu. You start zone in via Sealion's Den and from there run north to the bridge and touch the Crystal Field to get CS and start PM8-1 and after that you have to check the towers at West, East, and South towers to pop NM.
Each tower pop 3 NM's. They can 2h, but easiest way to kill them is to let BLM Sleepga the NM's. I had 2 BLM's in my team and they got resisted, so they used Elemental+Sleepga II to sleep them. Maybe the BLM's in my team havent cap Dark Magic skill but I'm not sure, from that point of view I say the mobs have high resistance against sleepga. So basically take one by one and BLM's keep the NM's asleep while you focus on one.
A tip is dont let the mages rest to far away down the bridge, because there are sharks swimming around and can aggro, one of our BLM's aggro the sharks like twice even if we gave him a warning =P
Each tower you have to touch the crystal to pop NM, after you killed them, touch them again to get CS. You repeat same process on all 3 towers, after you done you run to the center bridge where you touched the Crystal Field to activate PM8-1 but this time you zone into Grand Palace of Hu'Xzoi and you finish PM8-1.

When you are inside Grand Palace of Hu'Xzoi keep running north and touch the gate. You'll get a CS and Tavnazian Ring (Very good ring that got unlimited usage so you can teleport to Tavnazian Safehold) after that take the east door to get another cutscene and start PM8-2.
PM8-2 isnt hard if everyone is focued, it's just time consuming. Basically you gonna run your way up to 2nd floor to fight a NM. And on your way up there are gates that you cant open so you need to touch a panel nearby the gate to call a NPC which is a sphere with it you can go trough doors. So basically escort the spheres trough doors and repeat that to your way up to 2nd floor and fight NM.
The NM got 4 shapes, Ball (BLM), Bird (THF), Spider (WAR), Human (PLD). Basically treat this NM as an EXP mob with alot of HP that's all. The only thing we notice that was a bit annoying was when the NM was in Ball form and started to cast -GA spells. The NM can also do 2H so you guys also should know what type of 2H ability. Depends on which shape it's on though.
After you defeated the NM you touch the gate where you pop NM at first time to get CS. After that escape out and run back in to Grand Palace of Hu'Xzoi and trough the north door to start PM8-3 and you are now in The Garden of Ru'Hmet.

When you are inside The Garden of Ru'Hmet you will get cutscene and after cutscene you have 3 things to do on PM8-3.
1. Everyone need to climb up their respective towers that represent their own races. Each tower has 4 floors and as always at the top you get what you want the key item. (I forgot order of the tower, but check out any website for map) You dont have to climb all towers just the tower that represent you race. You can solo this if you want to.
2. After everyone got their key items after each tower everyone need to get 2 other key items which is Dawn and Twiligt key item (Forgot the exactly name). You basically run around and find them. (Check any website for map)
3. The PM8-3 pot BC contains 2x BLM and 2x RDM
Basically for the fight PLD engage all 4, BLM ES+Sleepga II (It's a must with Elemental Seal or else you waste a sleepga).
Sleepga order: BLM, BLM, WHM
Those with elemental seal and sleepga can sleep the pots. And our WHM landed his sleepga with elemental seal. We main focus on one blm and kill it ASAP and moved on to 2nd BLM and kill it ASAP. It's very important that BLM time the sleep spells because as soon the they wake up especially the BLM they will cast -ga which hurts alot.
We killed 2x BLM pretty fast and aimed for one of the RDM's and tried to do as much dmg as possible before we whipe. We brought it down to 34% before everyone whipe. We raised up again and repated the same progress and won the BC.
BLM pots are the danger part. If you have killed either 1 or 2 BLM and then whipe you are pretty gurantee a win. After the BC you zone out on other side of the BC and keep running north to get CS and finish PM8-3 and reward: A cool CS

After CS, escape out to Al'Taieu to trigger another CS and PM8-4. Now this one is pretty easy (the way to BC lol). Basically run in to Grand Palace of Hu'Xzoi and keep running north to zone into The Garden of Ru'Hmet, and keep run north till you reach an elevator. It will ask you if you want to Ascend or Descend. According to CS Promathia is in lower part of the palace so I guess discent.
Down there you enter a very nice small area called Empyreal Paradox. Take your chance to take a group screenshot =)

When you are ready enter the BC and prepare for your final battle=). Basically first form is easy. I let the THF tank, duo he got utsusemi and can dodge "Comet" cast by Promathia. So after 1st form is down you are rdy for 2nd form.
This one is a bit more tricky, he cast "Meteor" instead of "Comet" which is -ga spells, he also put up some elemental rings behind him.
Green Rings = Magic Shield
Red Rings = Psycial Shield
None = No shield
We decided to let the THF and Prishe duo Promathia, cant believe it huh? Both NPC are smart, Prishe is MNK/WHM she can use both 2h so take advantage of it and if you keep her alive you can basically let her tank. And the other one, forgot his name, something with Sel something he can Stun Promathia by casting some light lances (reminds me about starwars). Promathia pretty much stand still for a bit so our BLM's took the advantage to nuke him.
Remember when you finish 1st form and you gonna fight him on 2nd form. Dont engage him. You'll have like 3 min to med up before Prishe and the other dude engage Promathia =).

After you defeated Promathia you are basically done with CoP and wait for a new JP day to trigger some CS's around Vana'Diel and shortly after that you get your reward.
A tip, some people just get their ring and doesnt bother to trigger the two last cutscenes, I strongly recmond you do it because the last cutscene is awesome if you compare it with ZM ending.
Anyway thanks for your patient reading trough all this I hope you guys enjoy CoP as much as my CoP-Team did.
Takke.