Monk ,the stacking buffs in the long run will help , plus is melee ,wear leather and has positional attacks and nearly no burst and aoe ...makes sense that has the best dot.

drg has positional attacks too , but has some burst and aoe.

Blm is going to be king in aoe fights

brd in fight that punish melees.

summoner ? who knows....maybe in 2 target battle so can stack dots on both ....