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.
Heal for 210 for each enemy hit with Harpoon.
Heal for 50 every 1s while standing near a Shortcut.
Heal for 150 for each enemy hit by Broadside.
Increase your maximum Ammo by 4.
Increase your maximum Health by 200.
Harpoon no longer has a Cooldown, but no longer Slows enemies hit.