

Get off Wu Jens back! He's been through a lot. I still remember when he got a specialty weapon and an extra HP per level.
He's always had an eclectic list of spells, and a kind of "short man's complex" about his spell list. You don't play Wu Jen if you have a problem with challenges. Look again at the taboos. No, you play Wu Jen because you are called to it... And you can show those smug wizards and there academies what to do with there precious mage armor spell. Pffft.
But seriously take spell focus, cause a +1DC is a start and take the greater spell focus when you can, now you have +2DC . And don't horse around. Take evocation cause damage is always a good thing to do..
Usually poisoning a monster weakens there saves, and Hong Lau has a selection to dose you with the appropriate type to set you up for the kill spell. But you have that undead problem, so. I would get your hands on the Foxes Cunning spell that's +4int so +2DC.. which stacks with spell focus.
And don't under estimate status effects. Look again at the Apparition spell. It can cause all foes that can see you to become shaken (-2to saves etc.).. even ice blast spell does great damage + fail the save and -2str and dex. -2 dex = -1 reflex save. That's stackable. Plus, ice blast is an evocation spell..
Yes.. Wu Jen has short commings. I admit to the handicaps they gave us. But my pride will not let me cut bait and run out to be a wizard... You gotta want it. No matter how much it sucks.... yeah.