I am mostly interested in knowing what the proc rate is on bloodbath with whirlwind, but it'd be really interesting to know if anyone has done some testing to figure them all out. Is there an existing thread on any forum, of someone who did testing to find them? If not it'd be worth putting one together.
Easiest way to test i think is in act 1 with a fairly high life on hit, find a single zombie right outside tristram to hit.
I don't have links to it because I haven't found the actual source and am lazy, but if you dig around there's a .png with all of the barb coefficients and a short description of the testing methodology plus a few notes.