Gah! Now I'm considering re-augging my epic to go test some of these statements out. I had 2 Life Sap 2 augs in my 1.5 for the longest time before upgrading to what I have now, and I could have
sworn that I saw dual procs simultaneously from the augs. It was a while ago, though, so I could be remembering it wrong.
I do have a suggestion for another aug for the epic that's relatively easy to get now. It's a drop from the Depths of Darkhollow mission
Flight of the Seeker on normal difficulty, and it's called the Dark Shroud Gem. It's only slot 8, so you can't use it in conjunction with the one you have from RSS, but it does have 1 regular damage and 3 cold damage. I guess it depends what you fight, but you may see a slight damage increase due to the one normal damage instead of all of it being based on a resist check. I have that and the Crystallos augment currently (which if you can get I
highly recommend, along with everyone else who's posted that I've read) which I believe is called simply the Green Crystallos Stone. You can check, but I'm pretty sure that it's the best 2hand aug you can get that's groupable right now (I don't know about all the new stuff from SoD though).
If you're interested in the Dark Shroud Gem, you can check out the detailed mission info in the Reference Desk section of this site!
Zyph Starcatcher
81 Paladin on Tunare