+20% on all Holy healing spells.

[Deleted]

first i went lol, then i went jummie and lastly i thought to myself, now other classes have more reason to QQ

[Lysdexic]

The mastery hot has a higher potential overheal % than the absorption affect which is generally not wasted.

Well, where do you get that from?
If the person doesn't take damage, both will overheal. However, you'll never know that because there's no way of tracking "overabsorbs."