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 80 Health.
Increase the maximum amount of damage mitigated by Envelop by 7%.
Increase your maximum Ammo by 6.
After taking -375 damage, your next use of Chain Heal does not cause it to go on Cooldown.
Reduce the damage done by any enemy you are linked to with Spirit Link by 16%.
Spirit Link's Cooldown is increased to 7s and it now only lasts for 4s, but its base effects are tripled.