[Tech Q] Healing mechanics explanation?

Simply put, I cannot find a definition for healing efficiency anywhere, and have some questions about healing in general. How does it work? How does it interact with IDs like Greed, Rally, et cetera, if at all? Is healing based off of a stat, and if so does that relationship also impact Greed/Rally?

If there are any resources that go in depth on the mechanics/code of wynncraft stats, please send them my way! ^_^

 

Things I have learned:

Greed does not stack on itself if you have multiple items with the M.ID, unfortunately.

Healing Efficiency is a percentage that boosts all healing spells and regen (including Rally), received or sent, except for potions (and maybe or maybe not Greed, needs testing)

Water Damage% increases healing much like Healing Efficiency! This is to a maximum cap of 150% bonus water damage increasing healing by 75%.

Now the remaining question is if Greed is impacted in the same way as Rally by these modifiers, or if it is a flat rate based on max health.