Wisdom's a sucker bet, and, like Embellish, is a waste of skill points. Besides, that's *still* tying up skill points, when I want to have more of them (or, optimally, skill points that do MORE for their investment).
Mana Charms: Yeah, sounds like I'll have to. It worked out well in DD, but it didn't hurt that even a base spell did NOT cost 50+ to cast.