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 3 Ammo.
Regenerate 4 Ammo every 0.5s while channeling Restore Soul.
Heal for 140 every 1s while channeling Restore Soul.
Increase your maximum Health by 150.
Increase the Healing done by Rend Soul by 40%.