5 feats to use 1 two-handed specialist weapon at double damage, may be slightly to much but otherwise seems good, would say 5 feats if it could apply to any two-handed weapon, or maybe 4 feats if it can only be applied to one weapon as this would appear to be. The Samurai by the way i think may...
...just as a quick note, if your going Sci-fi, you could have a hypothetical advanced civilisation "push" Europa out of orbit to a much more distant orbit from Jupiter by the old fashioned method of multiple small fusion rockets since one side faces jupiter, this would have the dual benefit of...
Planetary Science
If it helps I study planetary science and if there was a hard sci-fi setting then in reality Jupiter would not be able to become a star, it needs 13 times more mass, and even then would become a Brown Dwarf as the Deutrinium inside starts to go through a fusion reaction from...
I think you were right, it is obvious from the spell description that it was intended to affect undead, and all force spells affect physical objects even if not specifically stated (wall of force being a prime example), since all force spells affect all physical objects, not just creatures it...
That sounds like a an idea, make it level 8 or 12 though, they seem to like multiples of four (or six) must be an unwritten rule ;) But I agree with Thanee, as a high level feat that sounds Ok
Hmm, not a bad idea, school-specific feats with the prereqs of having to belong to that school for the basic feats, then belonging to that school and the basic school feats for the higher level school styles, have to becareful of balance though.
Two Handed Power Strike
I'd worry about the scaling, it needs more feat requirements to balance. Why does this feat allow a guy to do double damage with a two handed weapon, is it because he's a specialist and knows how to use it better?