I've seen this other question which works out generally, but in the specific case of boss drops, are things stacked in your favour for any bosses/difficulties? I've recently started two monks and a barbarian and I've had two fist weapons and a sickle drop from Leoric, so it's gotten me thinking about this.
Diablo – Is boss loot stacked
diablo-3
Best Answer
For the first kills on a major boss at Normal difficulty; you are guaranteed 2 rares as drops (regardless of MF etc.) Also a comment here suggests that one of them will be a class specific rare, which would explain the fist weapon drops for monks.