1. How much imm exp do you need to learn 2 devious versality edges?

2. How much imm exp do you need to learn the third one?

3. Are kills from traps are fixed now?

4. Can you use isolate/separate to move mobs who aren't grouped? Can mobs can be grouped?

1 + 2. The prereq for devious is 2000 imm exp. After that you need any kind of edge points from pk, commerce, exploration or observation. Though a third should be possible, I have no idea if this would be worth it. Each one costs more and more points, and to get a third you would be sacrificing a ton of edges. Probably more than the 2-3 skills you would get are worth.

I don't know anything about the other questions.