What is with the Broken Blade Discipline

[icefractal]

A Wizard shouldn't be your only balance point. Neither should a Fighter. Really, the foes you're facing are the most important balance point, but failing that, I would probably go with a martial class that (IME) can pull its weight quite handily - the Gunslinger.

The Gunslinger does a pile of damage, both as a single high-damage shot and as a bunch of separate attacks, at range (long range, if spending grit), that hits almost anything (touch attack). They can punch through DR, through concealment, they can shoot without provoking, as well as a number of other tricks. That's something you could balance by.

Now in comparison, a 6th level Gunslinger with Rapid Shot makes three attacks, six with a double-barreled gun, and they all hit because they're touch attacks. No bonus damage, but you are adding Dex to damage, and that's without any deeds. And with a single gun - TWF would amp it up more, assuming you have a method to reload. Now if you want to be a bit more brutal, a Gunslinger 1 / Ninja 5 with the right feats makes the same six attacks, but adding +6d6+12 sneak attack damage to each one.

Conclusion: Not feeling like this maneuver is too crazy. Maybe it should be L4 (so 7th level) instead of L3, given nobody is quite matching that at 5th.