Ninja: Walk in shadow.

[Viridiana]

I think the only 3 possibilities it will use for cross-classing are PGL, ARC and MRD; some combination of them.

They're gonna need some way to manage TP. Either Invigorate or some other source of damage to weave in with reduced or no TP cost. Right now the only TP-based classes that don't have Invigorate are the tanks, who both have alternate ways to manage TP.