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.
Each arrow of Rapid Shot reduces the Movement Speed of any enemy hit by 10% for 2s.
Reduce the Movement Speed penalty while drawing your Longbow by 60%.
Reduce your active Cooldowns by 30% when you get an Elimination.
Heal for 210 after hitting an enemy with Crippling Arrow.
Heal for 320 after using Withdraw.
Increase the rate at which your Longbow charges by 25%.