Has anyone used these in their games? Did they unbalance anything? I'm considering making them available in my game (especially for monks, as many emulate Wuxia actions).
My gut instinct says they're fine, since they're close to abilites granted by PrCs. Howevre, I've never seen them in play, so some experience with them would be great.
i've used them a little bit. seem fine. the thing i didn't like about them was the way they were presented. arcane battle feats? this is a fighter book. leave the arcane out. spellcaster or you had to take a feat to take them. i felt like they could have been presented in a different way, i have presented them in a diffrent way in game.