It sure helps loads when both healers hit that magical number, but you can still clear V4 Savage with Healers doing less damage, "Neo Exdeath has a hard enrage of ~12:45 with a raid DPS requirement of at least ~24000" -
https://ffxiv.consolegameswiki.com/w...e_V4.0_(Savage)
4 DPS doing at least 4k damage each = ~16000
2 Tanks each at least doing 2.5k each = ~5000
Meaning both healers need to hit a minimum of 1.5k DPS each = ~3000
I've seen DPS pull above 5k and tanks go above 3k. I've seen healers go above 3k as well, but the main point I am trying to make is, it IS possible to clear without both healers getting 2.5k RDPS.