First of all we need a tank party, so that it will control the raid and not let it attack weak defensively characters.
Tank Party:
1. Tank (aggro)
2. Warcryer (Chant of Shielding, Chant of Fire, Earth Chant, Chant of Victory)
3. Swordsinger (Song of Renewal, Song of Earth, Song of Champion, sometimes Song of Warding may be needed.)
4. Blade dancer (Dance of Concentration)
5. Bishop (heal tank)
6. Elven Elder (Clarity, Advanced Block, Bless the Shield for the tank and recharge for the bishop)
7. Elven Elder or Shilien Elder (Recharge Tank)
8. Elven Elder or Bishop (Secondary Healer)
9. Elven Elder or Shilien Elder (Secondary Recharger)
That's how a tank party is set. Now, we need to make dd parties. They can be formed by nuker or by fighters (Always destro or archer!).
Mage Party:
1. Swordsinger
2. Bladedancer
3. Elven Elder
4. Shilien Elder(Not that needed if there is an 77+ Dominator.)
5. Overlord (Notice that when casting Rage of Pa'agrio the Tank should be a bit far away from him, so that it won't have its Magic/Physical Defence reduced. Also, it's not necessary to exist in all mage parties. 1 Overlord is enough, since his buffs are obtained by the whole clan. In the other parties, we can replace him with another nuker!)
6. Bishop
7. Nuker
8. Nuker
9. Nuker or Elemental Summoner
Fighter Party:
1. Swordsinger
2. Bladedancer (Never use Dance of Vampire. Archers don't need it and it causes problems to Destroyers with Frenzy! )
3. Warcryer (Never use Chant of Vampire, since Archers don't need it and it causes problems to Destroyers with Frenzy..)
4. Warlock
5. Bishop
6. Archer or Destroyer
7. Archer or Destroyer
8. Archer or Destroyer
9. Archer or Destroyer
Hope you find it helpful :)