Quote Originally Posted by redoubt View Post
+10% chance to activate switches/levers etc without exiting sneak.

I would never want to rely on chance if I'm trying to solo a dungeon with minimum kills, I'd just keep using Flaming Sphere scrolls, glitterdust, etc. Either make it so you never break stealth when opening levers (i.e. make stealth boring and easy) or just don't.

Great work on light armor mastery, but Nimbleness needs to add to dodge cap with each stack.

Killer needs to expire one stack at a time.

These please

Execute: Melee Assassinate attack: +3[W] damage. If target is below 30% health, deal 500 damage. This damage scales with 200% Melee Power. (Cooldown: 15 seconds)
Raising the % is good. Add a second check against the assassinate DC: if below 30% the attack triggers an assassinate attempt even if not in stealth. If not assassinated, deal 500...

The damage should scale with epic levels at least, if an insta-kill effect isn't added

Assassins do not have a lot of ways to create a helpless state. They depend on others to create the helpless state and then pounce upon their victim. Within Knife Specialization you could add:

You can use Balanced Attacks
..