No objection in general to your shopping, but I'm going to rule that the ability damage from persistent spell is a cost rather than damage, so negating damage won't protect against it.  (I'm not sure if that's within the D&D 3.5 rule set, but surely you've played games where costs and damage are seperated)<br/><br/>Aside from that ruling, all your purchases are approved, although you may want to reconsider them.