I've tried curing others, however, if you're at the point where other people are taking enough damage to matter, you already done *** up.
Cure cheats are, in fact, still a useful thing.
If you aren't going /BLU, then your best best may be to tag the sleeper with a cure 1 after they sleep everything to get on the hate list for all mobs, then drop some cure 3/4 cheats for enmity.
It's MP intensive, but doesn't have the recast issue that JA do, and actually gives decent CE, unlike most JA. So you get a strong VE spike along with some lasting CE.