General

Paladin's, dem elemental resist.

night lord probaly

Bishops are best class

Xenon for bosses where you need to dodge (ex. Beam Dancing at Gollux is really useful since you can attack while dodging)
Luminous for bosses where you might want to mob while dealing damage (ex. Being able to kill the Gollux minions while attacking his main head)
--> Also useful for bosses with annoying 9999 wep. def mobs (Arkarium has annoying mobs that can only be killed by magic damage)

In general you want a ranged class like Xenon's snipe or Lumi's reflection/laser so you avoid touch damage and 1HKO moves like Gollux's orange roar

ToC + Burst Damage class