The bait warrior?
Um… as a warrior, if you hit 20% hp a single burst attack from a thief/ele/guard/mes/necro/engi/ranger/warrior will drop that to 0% before your regen ticks UNLESS you hit endure pain and are at 0 conditions and nobody puts a condition on you.
Yaks Bend
Desperate power is a noob trap and needs to be reworked to something better. No point in picking that over leg specialist.
The only classes that I’ve encountered that do that are other warriors (very obvious and avoidable), rangers (not too common, and very vulnerable when they’re doing it), and thieves (who indeed throw a wrench into the tactic). But no warrior build will really survive against a competent thief, Hammer builds are only useful on thieves who don’t use blindness, i.e. almost never.
If your enemy’s HP is also less than 1/2 this might be alright. I could see hitting 25%, Endure Pain, and trying to Burst them down. Other than that I don’t see much viability.
That said, try to make it work. I’d love to see more builds working for people.