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.
Increase your maximum Health by 200.
Heal for 350 for each enemy hit with Harpoon.
Gain a 150-Health Shield after dropping to or below 50% Health.
Generate 4 Ammo for each enemy hit by Harpoon.
Increase your maximum Ammo by 1.
Harpoon no longer has a Cooldown, but no longer Slows enemies hit.