6.5-8% Strength for 3.5s on Hit. Stacks 5 times.
Hitting at least 3 enemies with an attack, increases your damage by 24-36% for 3 seconds.
Gain 7-10% Close Damage for 3.5 seconds after killing an enemy at close range, stacking 5 times.
Up to 14-20% Damage on Hit (Staggered Enemy), scaling with Stagger.
Still looking at options,