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 20% for 2s.
Reduce the Cooldown of Crippling Arrow by 0.6s.
Reduce your active Cooldowns by 50% when you get an Elimination.
Reduce the Cooldown of Rapid Shot by 0.6s.
Increase your Movement Speed by 12%.
Increase the rate at which your Longbow charges by 25%.