As long as i get to be the frog
(I would add that I don't think whack-a-mole is driven by any desire to optimize use of spell slots. It's actions that are being optimized here. Actions are the currency with which you buy victory, and a healing spell is an investment: Spend an action now, to earn back actions later when a teammate is up and fighting instead of down and bleeding out. If your expected return on that investment is less than the action you spent on the spell, it's a bad use of your action. Whack-a-mole is a way to guarantee a return.)
Why aren't my proposed healing tactics not a way to get a guaranteed return?