Suppose we have a weapon with two special abilities of the same kind. For example one from Krong and one from encrusting. Will the chances that the ability will proc on hit stack? The same question goes for two items with the same special ability like 2 amber rings for example. Is it possible for 2 identical abilities to proclaim at the same time? I'm curious.
Procs gained from skill trees often proc at the same time, so I would imagine those gained from Krong or encrusts to do the same. It's just a line of code that runs through all the hit chances and rolls some dice, I don't think it matters where it comes from. Analogous to that, I think two amber rings would mean you can get the effect twice, but that you generally just double your chances to get it once, due to the statistical improbability of that happening.