Blue
Ravenous Bugblatter Beast of Traal
Yeah, this is an efficient setup. Had a campaign that ended that the DM ran a 2-session special for us a year later to tie up a plot thread. We ended up at one point with seven 10th level characters vs. nine young blue dragons and a blue dragon wyrmling in a wide open place with no cover. We did have a life cleric who wanted to be a primary healer, and my bard. The dragons got initiative on us, dropping one barb and the fighter from full and really hurting the rest of us. In terms of initiative, I went after the dragons, and then our healer, and then everyone else. Almost every turn in that combat was: I healing word the cleric to bring her back up, and do something with my action that isn't a levelled spell (since I bonus action cast). Our cleric uses some sort of mass healing to bring back everyone who fell and give some buffer to others. They pound on dragons. New round - dragons drop at least two people, but never both the cleric and the bard the same round. Lather, rinse, repeat.My take is you want one full-time healer and one or two backups (who mostly focus on other things), with the backups' only curative job being to keep the main healer upright.
Having a backup healer (including the cleric who isn't much focused on healing but will in a clutch) gives a lot of robustness to a party.