The Definitive Dark Knight Guide

[tremor24]

Dark Passenger eats mana.

If mana isnt an issue---sure go nuts! Its OGCD

In most other cases, newp. Better to use it on enhancing another ability (another dark arts for instance). On the reverse, if its 2+ enemies, then id instead use it even at its base potency over a dark arted ability (100 potency * 2 targets vs say, soul eater going from 280 to 400 on one).

Dark Passenger (no Dark Arts) is a gain of 150 potency on a single target for half the mp of Dark Arts Souleater (which only gains 120 potency over Delirium). If main tanking and you really want the HP restore then fine, but Dark Passenger even on single target is better than the enhanced Souleater for damage/MP efficiency.