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 an additional 160 after activating Battle Shout.
Increase your Healing received by 6% while your Bulwark is active.
Increase your maximum Health by 300.
Increase your maximum Ammo by 15.
Reduce your active Cooldowns by 40% after getting an Elimination.
Increase your Attack Speed by 40%, but reduce your damage-per-shot by 25%.