I've played him a bit over the course of his few and far between free weeks, and I like the tanky ninja. I'm thinking Marks: Magic Pen Seals: Health/level Glyphs: MRes/level or flat cdr Quints: MS or flat HP
Side note: I farmed as well as a (decent) Heimer in my last game with him --- Call me Zurr. Not 'Wolf', 'Link', or any other silly thing you think of. Zurr.