

So the jewel replaces your MoM keystone
So you take MoM bodyarmour
60%MoM
60%damage taken gained as mana over 4sec (or some regen)
200%increased es recharge rate from dicipline and passives and jewels==> 60%life recharge per sec
60/(1-0.6MoM)=150%of life pool can be tanked and healed per second
downside:
bad use of energy shield
50%use of regen and leech