At 50 in full darklight and relic +1 those 30 mnd equate to roughly 56 hp per physic on average. Biggest hit would be to Ado though where it would make over a 100 hp difference on a crit shield + 60ish on the initial cure. For coil the extra hp per cast can make the difference between healing through spike damage and not. can check various scenarios hereValk's Healing calculator