My wife had an idea, and I’m building off it.

Life Infusion Spell 1

Necromancy
Traditions divine, occult
Cast [two-actions] somatic, verbal
Range touch; Targets 1 creature
Duration sustained up to 10 minutes

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You channel additional life into a target. Each round at the start of their turn, they gain 1 temporary hit point. They can gain temporary hit points equal to your level. If you do not sustain the spell or you are disrupted, the spell ends and all temporary hit points are immediately gone.

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Heightened (+1) The temporary Hit Points per round increase by 1 and the maximum temporary hit points increases by your level or you can choose to target one additional target. As you cast this at even higher levels, you can choose a combination of targets and increased temporary hit points.

Thoughts?