Hitting at least 3 enemies with an attack, restores 12-15% toughness.
5-8% Strength for 4.5s on Kill. Stacks 5 times.
You are a toughness-regenerating, horde-clearing machine with this build. I find it extremely difficult to die when slamming c*ck-first into an otherwise overwhelming group of heretics.
The Kickback is more so used as a tool to give yourself more bonus melee power, and to one-shot maniacs + shotgunners. It has great stun capabilities, so even though you're unable to deal with a sniper most of the time, it will stun it long enough for someone else to deal with it. Spamming lights is really the only thing you need to do with this build, and your toughness never depletes when standing within coherency while inside of a horde.
Not sure how the 100% toughness regen skill stacks with the extra 75% from curios, but it is very noticeable.
Personally, I cannot think of a better horde-clear build that is also capable of dealing massive amounts of damage.