Walking triage

[Danielqueue1]

so with Xanathar's guide coming out and lots of classes now getting more healing options I'm curious to know just how much healing a Dedicated healer could put out over the course of a day. here's the situation War is happening and healers are in short supply even dragons are picking sides in the conflict. you must make a build that can do as much healing as possible far behind the front lines of battle.

Rules I'm using.
1 1 long rest and no more than 3 short rests per day. (coffee-lock need not apply)
2 Assume all relevent stats are +5
3 all dice are assumed to heal for average amounts 1d8=4.5 hp.
4 this character will use all of its spell slots only to heal.
5 abilities that only work to bring a character from 0hp to 1 don't count.
6 spells are considered to operate for their full duration.
7 no spell or ability can affect more than 6 individuals. and cannot trigger more than once on each target in a single round. (no infinite grapple chain on healing spirit.)
8 Temp HP doesn't count.
9 only PHB, EE, SCAG, and XGtE. no UA, no homebrew.
10 no items other than spellcasting components.

The categories
level 5, level 12, level 20
Single target, 6 targets
with healing spirit, without healing spirit.

Edit: for the level 20 category, you only get 1 simulacrum no infinite wish-simulacrum chain. please.

[Danielqueue1]

5th level build, Single target, with Healing spirit.

3th level land druid 2nd level Life domain cleric.

2 3rd level slots for healing spirit (20d6+50) each average total healing ~240 HP
4 2nd level slots (3+1 for natural recovery from land druid) (10d6+40)each totaling an average ~300 HP
4 1st level spell slots for Goodberry each goodberry healing 4 hp with life domain boost gives 160 HP
4 uses of Channel divinity: Preserve Life (recharges on all 3 short rests) at 10 hp each gives 40 HP

Total Average 740 HP single target with healing spirit.

5th level, AE, with Healing Spirit
same Build. lay down 6 stretchers right next to each other with the injured and each target starts it's turn there.
2 3rd level slots for healing spirit 6*2*(20d6+50) ~1440HP
4 2nd level slots for healing spirit 6*4*(10d6+40) ~1800HP
4 1st level slots for Goodberry=160 HP
4 channel divinity preserve life =40 HP

Total Average 3440 HP AE with healing spirit.

[Grod_The_Giant]

Swap Land Druid for Circle of Dreams. That gives you a whole new source of healing.

[Danielqueue1]

Swap Land Druid for Circle of Dreams. That gives you a whole new source of healing.

Would the circle of Dreams healing outpace the circle of land natural recovery spell slots?

[PeteNutButter]

Would the circle of Dreams healing outpace the circle of land natural recovery spell slots?

Circle of the shepherd would probably outpace that even more. Six times druid level per spell slot extra healing.

So Life Cleric 1/Shepherd Druid x seems like the money build. Mix in warlock 3 for higher level builds for short rest recovered healing spirits.