Mister_Fetch

The rule of thumb seems to be that if the proc affects you, it only checks on the first strike -- the others affect the links of the chain itself. If the proc affects enemies, then it checks each time.

On my controller, I've got the Hold proc from Devastation in there. It's not much, but it's satisfying on the occasions when it goes off three or four times in a large group.

Fear powers that work on (some) robots, which led to this exchange at one point:

"How did you just terrify those things?"
"Two words: Windows. Vista."