Taken from:
[Info] - Druin's Mechanics Workshop - Forums - Diablo III
Bugged/exploitable items/skills you may want to know about:
Burning Axe of Sankis has no internal cooldown - this is likely a bug
Thunderfury's proc hits the target it procs on twice
Odyn Son - if there is only 1 target the chain lighting procs will ALL hit the 1 target resulting in a massive 1200% weapon damage to the single target.
Gyana-Na-Kashu ( monk only ) - Fireball ( procs on every cast ) currently double-hits the first monster it collides with causing GNK to do incredible single-target damage
The Monk skill epiphany - inner fire - snapshots gear/skill damage so Blinding Flash - Faith in the Light is BiS/OP you could also snapshot Harrington's proc or just gear swap for a massive 15sec dps increase.
Nothing major but might help you a bit... have fun.