This question could loosely be considered a follow up to "Can Goodberries heal a Life cleric when consumed by another."
How much life would a level 6 Life Cleric with four party members gain from the Blessed Healer class attribute with a casting of Mass Healing.
Beginning at 6th level, the healing spells you cast on others heal you as well. When you cast a spell of 1st level or higher that restores hit points to a creature other than you, you regain hit points equal to 2 + the spell’s level.
As you call out words of restoration, up to six creatures of your choice that you can see within range regain hit points equal to 1d4 + your spellcasting ability modifier. This spell has no effect on undead or constructs.
If the Cleric casts Mass Healing, targeting each of the 4 party members, how many times would the Cleric gain 2+Spell Level? Taken further, would the Blessed Healer effect be prevented if the Cleric targeted himself with Mass Healing, in addition to the other 4 members of his party?