Ask an Aran thread.

Other than some 4th job, don't most skills just require 30 combo? That really doesn't take that long. 15 seconds, ish, on mobby maps. o.-

Probably even less than that later on. And the more damage you do on the later levels, the less you would need hp pots. This would be a great asset in TT mobs coupled together with Snow Charge slowing down the monsters.

Get 30 combo, use Drain, get 200, use Combo Barrier, repeat if necessary.