Part-Time Scholar - awesome effect, convoluted prerequisites. It'd be broken if it's too easy to get (every wizard would take it at 1st level), but as it is you need some sort of twisted gish build to access it (one that can survive to at least 12th level with high Int, and that needs Str/Dex high enough to survive in melee to that level yet still benefits from replacing them with Int at that point..?).

Weapon Focus/Scholar - good buffs.