This is our proprietary skill rating calculation. This has nothing to do with official game ranking or MMR.
The purpose is to show player skill levels relative to other players, not estimate MMR.
Hitting an enemy with Presence reduces its Cooldown by 3s.
Reduce your active Cooldowns by 40% after getting an Elimination.
Reduce the Cooldown of Grace by 1.5s for each enemy hit with Valor. Can only happen once every 3s.
Generate 3 Ammo for each enemy hit with Valor.
Increase your maximum Health by 50.
Hitting an enemy with Heirloom Rifle increases your Heirloom Rifle damage against that enemy by 7% for 3s, stacking up to 5 times.