The set is altered:
Ravager
OLD: When you deal melee damage, you have an 8% chance to increase your Weapon Damage by 645 for 10 seconds. This effect can occur once every 10 seconds.
NEW: Each time you attempt to reduce the target’s Physical or Spell Resistance, you gain a stack of Ravager for 5 seconds, increasing your Weapon Damage by 125. You can gain a stack every 1 second. At 4 stacks, the duration doubles but cannot be refreshed.
How do I reduce the Resistance?
Do I need to taunt the enemy?
Or are the cps in "piercing" doing this?