Well, Quicken Spell is no good b/c he's a spontaneous caster, but I think Maximize is good. Reach Spell also sounds good. I think I like Greater SF, as well. We could go with some kind of Craft Magic etc feat for the last one.
I'd rather go with Greater Spell Penetration or another combat feat than a Craft Item feat. I can't really see uber-zombie tinkering in its workshop on a belt or wand.
I say 145 pounds. I sort of see him as skinny and withered, not hulking.
The language choices sound good.
Triple treasure. If a party takes him down, they'll have earned it.