one of the thuerge classes works just fine, take warlock 1, shadow caster 1, wizard 2 (i think) and then take the prc to advance warlock and shadow caster. take shadow caster next, trading off a level of wizard (or 2, idr if you can trade them all or nor), and continue as you wish. Pretty good build actually, seen it played. Works alot better apparently then it looks on paper.