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.
Every Soul Charge you detonate generates 1 Ammo.
Heal for 50 every 1s while using Shadow Travel.
Heal for 210 every 1s while channeling Restore Soul.
Increase your maximum Ammo by 10.
Increase the Healing done by Rend Soul by 40%.