I'm up to at least 24-26 runs so far, waiting for aiming legs and feet to drop. I still haven't actually seen them at all. And then I keep getting these duplicate loot drop runs where aiming chest piece or head drops from 2nd boss, 3-4 times in a row and casting chest piece from last boss, 5 times in a row.

But what really grates/scares me is that I know the minute I roll as a non-aiming job, they'll drop. And I'll lose the roll.