The fundamentals of a speed clear would be:

-One ranged with Lost Dervish per group

-One magic DPS with the Elder/Cure IV combo per group

-Two physical DPS with Rend Armor to maintain 100% uptime on the debuff

-One magic DPS set up to dump boosted Flare Stars on everything

I assume you would probably just want one tank and as few healers as possible as the pure essences for DPS are simply too powerful to really warrant bringing tanks/healers with DPS set-ups unlike Castrum/Dalriada.