What's the "best" AoE classes in the game for specific situations?

[Thotor]

Earlier today in AK speed run I did 3.5k-4k~ dmg within 5 seconds on grouped up trash mobs, with each eating a massive crit from Flare (2.4k~) followed by another swift cast Flare for 1.2k~ non crit.

^ This. BLM is unbeatable in AoE.