52.5-60% Weak Spot Damage (Enemies with Bleed Stacks).
70-100% Rending on Backstab Hit.
30-60% Rending on Critical Hit.
10% Critical Chance for every 0.3-0.45 second while aiming. Stacks 10 times. Discharges all stacks upon firing.
Exe Stance is actually a genius 4head play. You see:
So you use executioner stance on cooldown to glance around at what's coming. This saves enough points that On Your Toes can restore your Toughness. It's not as good as Voice of Command's overshield but VoC is pretty overtuned and the wallhack spam is pretty unique. Absolutely no points left for Tactical Awareness - and that's fine, we wouldn't want to burn 2 on a utility move.
Knife blessings are pretty set in stone. Revolver can be whatever - Hand Cannon is nice because of the bug where it applies to melee crits, though this build only benefit from it on front-stabs due to Ruthless Backstab. Stamina curio might be unnecessary, I just happen to have a good one that goes on all builds.