Talk:Runes/@comment-26310852-20160507020710/@comment-3444820-20170102200707

While success on a heal is based on your defense (vs the offense of the person you are casting it on), mass heal always works (is successful, gets the health rune bonus, etc).

What that means is that while a level 150 won't be able to get the health rune bonus casting heal on a level 9400 (yes, there really is one), he will get the bonus casting Mass Heal.