I read your full statement but it was not a good idea and im telling you why regardless of what happens to disembowel. Nobody cares about any of that, stop asking for sub optimal balance choices that'll only hurt RDM
IF piercing needs to go then start advocating for it's removal instead of situational garbage. just because you raided with 2 casters doesn't mean we should give rdm a magic buff that locks out embolden.
Contagion is powerful HOWEVER, it comes at the expense of utility for jobs that aren't using magic damage making it worse than TA unless used in unconventional comps like your 2 caster. But AGAIN hypercharge buffs everyone in the raid and see's far more success than embolden or contagion. so it stands to reason we should advocate for an equivalent to THAT instead giving rdm a buff they'll never use unless they're trying to preform suboptimally. Tl;dr i don't care about your double caster experiences, magic only debuffs are a BAD idea right now. only 6 jobs in the game will benefit from them none of which are tanks which means your group will still be far inferior to just about any standard comp that isn't using double jobs. If they did implement this and lets say it did become meta, would you be happy with 3 caster 1melee or 1 ranged comps. it'd literally be the 2nd coming of disembowel which the very thing you're hoping gets removed.
If their lower personal dps matter, they wouldn't be meta, their Utility ceiling is astronomically higher than say embolden because it works with all jobs. It's very possible to say that every job's meta comp is some Version of NIN DRG and BRD because those jobs power on their own is great. TA is amazing without a BRD/DRG, BRD utility is great without DRG/NIN and DRG's utility is in full force as long as even 1 BRD or MCH is present and battle litany is just icing on that cake. these 3 powerful jobs make up the unholy trio because they're so good alone and even better than that together. Utility is attributed towards the job that has it, not the jobs that benefit from it. BRD's utility doesn't get worse without a drg, it still really strong