От Elysianfield (10,786 – 4·25·35) 29.07.2022 (Burning Crusade)
Over the past few weeks, I've kept records of the number of crafts and bonuses that I've generated when crafting super mana potions
Number of crafts: 6774
Number potions created: 8229
Total # of extras = 1455 or 21.48% extra
Using some somewhat dodgy math that I haven't done in years (Beta distribution with alpha = 1454 and beta = 5318), the actual bonus rate has a 90% chance of falling between 20.8% and 22.1%.
Note that I've made no distinction between x2, x3, x4, and x5 procs, I'm only looking at the total number of bonuses. Unfortunately, due to the way that potions only stack to groups of 5, I found that trying to document what the actual procs were was too tedious. Potions often try to fill a stack, so a x4 proc might look like x3 and a x1 in the log, since it's trying to complete a preexisting stack. As such, the chance that any given craft will generate a bonus proc is lower than this percentage. We're looking at a
17% to 18% chance of receiving some kind of bonus on any given cast.