Well I've never done Ramuh ex either so we can all carry each other. And I think mumble is helpful mainly so the tanks can say when they picked up their orbs so the party can clear out the rest. Someone who's done it can correct me if I'm wrong though.
It's been awhile, but in the last half orb pick-up becomes more complex, as two people get chained together, and one of them needs to grab three to become unchained. I, forget the exact method that was used to deal with that last time I was in there. I think possibly the party just waited until there were enough orbs to go around, or something. <_<;;