For the moon godlike it will proc every 25% besides 0%
I think this is much better then the 3 DT you get from fire godlike because even without any Con bonus, Monk got really high health and endurance.
for me at lvl 8 with 15 Con the 75% heals you full the 50% get you close to full as well, not to mention it's a really big AOE and heals every one.
The only time i need a priest heal is when the backline takes damage or every enemy wants a piece of my monk, but even then it works really well because of Rooting Pain.
So fare most of the fights are short so i can even send the monk in first and get alot of wounds and not worry much after, because Monk got sooooo much health that you are properly gonna be resting from other party members fatigue before your healths drop to 0.