Grimm Passive Attack Questions

[Alhuntrazeck]

Doese Grimm's passive attack proc all its effects (-20% armor, -20 dex, -20 int, -20 str and -35% hit chance at l40) at once?

Secondly, does Grimm's passive attack -20% armor proc stack with the -10% on AA?

[Serancha]

It was announced on Grimm's release that the passive does stack. "if you're lucky and get multiple occurances of the proc in succession". Since it's a "chance to be awesome" thing, it doesn't happen every hit, so I don't think it stacks up all that high.

Given the recent stacking revelations, I think the 20% armor reduction most likely overwrites the 10%.