Ta Ma Da Ran Lu,
In my opinion Wizard Slayer is definetly worth playing despite his disability to drink magic potions (it's a pain although) and wear magic items.
My Wizard Slayer specialized in Long Bow and Bastard Sword (and I can say that those bastard swords were a wrong choice
). I think for this class would be nice to use ranged weapons (bows, long or short) and Long Swords. Sword with vampire ability is helpful since this character can not use healing potions.
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Sincerely Yours,
Tanda