Zubatcarteira
Now you're infected by the Musical Doodle
I've found that just letting allies drop to 0 is pretty damn dangerous if the DM isn't being super nice. Any attack within 5 feet while you're unconscious is an auto-crit, and a crit at 0 is two failed death saves. A single hit from close, and they will die if they fail a death save, or if they just get attacked twice. Way too dangerous to risk, imo, so having someone to keep allies at higher health is pretty important to me.