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 the Healing Spirit Links provides every 1s to your linked friendly target by 100 Health.
After taking -125 damage, your next use of Chain Heal does not cause it to go on Cooldown.
Increase your maximum Ammo by 6.
Increase your maximum Health by 50.
Reduce the damage done by any enemy you are linked to with Spirit Link by 20%.
Increase the range of Chain Heal bounces by 40%.