It's something between 500 and 1k. I doubt it's fixed since gambling depends on enrage gained and being 'twice the chance' implies the first roll does as well. Regardless, each gamble counts as 3 attempts since you have one at normal chance and one at doubled chance. If just half my kc was gambled that's two times my kc in 1/900-1k (I never waited on araxxi) rolls. Nowhere near complain worthy as others but still unlucky.
Hi
15-Jan-2016 18:10:47