So are you throwing more than 6-9 encounters at them between long rests, or less?
How often do you allow short rests?
You know, you can get up to 1368 HP worth of Mephits out of a single cast of Conjure Minor Elementals VIII, and you can also get 576 HP worth of wolves out of Conjure Animals V + Speak With Animals (ritual) + Inspiring Leader.
And you can stack the Healer feat on top of that, as Mistwell says.
To my understanding, Sage Advice is no more "official" than "Unearthed Arcana". Is that right? Am I missing something?
I don't really think this is that much of a problem. I mean, do people know players who are jumping on this life cleric/druid bandwagon or are they continuing to level their druid or their cleric? I know that if I had a cleric or druid I would in all likelihood keep leveling them up in the same class, I wouldn't level dip just for this. I'm not saying that everyone wouldn't, I'm sure there are some people who jump at the chance to boost certain aspects of a character, I just don't think that every player playing a healer is going to.
I do think the ruling is dumb but not game breaking and it follows the RAW.
Disciple of Life said:Also starting at first level, your healing spells are more effective. Whenever you use a spell of first level or higher to restore hit points to a creature, the creature regains regains additional hit points equal to 2 + the spell's level.
Goodberry said:(Duration: Instantaneous) Up to ten berries appear in your hand and are infused with magic for the duration. A creature can use its action to eat one berry. Eating a berry restores 1 hit point, and the berry provides enough nourishment to sustain a creature for one day. The berries lose their potency if they have not been consumed within 24 hours of the casting of this spell.
And all it does at the end of the day is save money on healing potions, money no one uses since you can't buy magic items.

(Dungeons & Dragons)
Rulebook featuring "high magic" options, including a host of new spells.