The entire argument is invalidated by the gating se has been putting into dungeons for the past year. 2 groups at once is not a speed run, is simply efficient. It is doable in the bare minimum gear without much risk to the group. Unless your healer is a complete idiot or dcs, there is nothing to worry about.

Fractal. On way to first boss, you can ONLY get 2 packs at a time. On way to 2nd, the packs are too far spread to bother. On way to third you can only do one at a time.
Neverreap. On way to first boss, again only 2 packs. On way to 2nd, bees. On way to third, more bees.

Until a dungeon comes out again that is actually not designed to block speed runs, this thread is pointless whine about older content.