[DarkRanger]

I'd go with a Rakshasa 10/10 wizard/PM lich wielding a greatsword. Immunity to all spells level 8 or lower covers undeath to death and mass heal, and you can choose from any feline head you want. On the other hand if you're actually serious or semi serious about making this character on Thay, I'd suggest ranger/assassin for slightly higher AB, free dual wielding feats, a few spells and 2 favored enemies.