Here are my concerns: I haven't run over the mechanics too much, though they seem excellently well done. I am concerned by the fact that you base these abilities strictly on fighter level, though. That creates a lot of conflict in my mind. First off, I play AU, not 3.X, so there's not even a fighter to consider. I hate to think that, say, a mageblade is restricted from taking this. I'd prefer to see something along the lines of a BAB requirement, with fighters getting these for free at relevant levels. That way if Wally Wizard really wants to be a bad-aspirin with his q-staff, he can take Improved at level 12, when he has +6 bab. If Mikey the Mageblade wants to, he can add it, but he's not as good as the straight fighter, since he's getting magic enhancements.