+5-8 Bleed Stacks on Critical Hit.
+12.5-20% Critical Chance for 6s on successful Dodge.
+4.5-6% Close Range damage on Repeated Hit. Stacks 5 times.
+5-6.5% Strength for 3.5s on Close Range Kill.
Lacerate seems bad (and usually is), BUT... If used properly by hitting an enemy in the body first you can build up scourge stacks after a single hit.