Originally Posted by
Dumbledore lives
The class looks fine, though seems a little limited in scope. All it really adds to TWF is more numbers, which is always nice, but does not add much more flexibility than a whirling frenzy barbarian with TWF feats.
That and the 19th level ability seems more like a capstone, and can result in decapitations 30% of the time per attack, and when you have so many attacks that is quite a high chance indeed.
I'd say add some more options, looking to maybe the Tiger Claw disciple from ToB for some ideas, though that is quite a specific archetype, and yours is more general.