Backstab Assassin

So, Started with a fairly normal Twin Fang Strike build, but after dying a bajillion times I've moved to Backstab which has a few questions attached.

1) What exactly is the 100% dodge period? I know that its only a few frames, but getting a number down would be nice.
2) Is there anyway of extending it? Even getting a few more frames out of it would be massive,both to survive the nastier ondeath procs and since I'm considering..
3) Anyway of slipping a Blink cast duration inside the dodge period? So very often I'm finding myself finishing off the guy in front, and then getting shredded by all their friends (Tran Athula, I'm looking at you)

1) 0.4 seconds (10 frames) if I recall correctly. Correct me if I'm wrong.
2) Don't think so. Similar to Sacred/Unholy Armor, and Demiurge, the duration is not extended by buff duration increase.
3) Due it's short duration, and Assassin's generally poor cast speed when you aren't a caster, most likely never. It's basically designed just to give you a little bit of needed beef while you don't have access to max block.

1) 10 frames at char level 1. This decreases to 3 frames at max char level for obvious reasons (you would be immune with superbeast nagi if it lasted more than 4 frames).
2) Sego is correct - it is not possible.

Yeah, I rather figured that it would be a bit broken to be able to get it extended too much. Attached question. I've had Iceshell equipped, with the logic that the glacial novas should be able to keep me alive, but it doesn't seem to work, even though according to the documentation it should proc even when I'm dodging everything?

Hover your mouse over the under-dotted text "when attacked".