The backspawn with absolutely no safe spaces does not allow droners to run this cave even in a completely full group.
Droners have to reposition constantly (every 2-3 minutes) because of the frequency and proximity of the red spider respawns.
Red spiders do not target your drone - they hunt down your body, even in a group. You can not save yourself from getting targetted.
I get that the cave is intended to be difficult. But there needs to be somewhere for a droner to be safe - even if it has to be cleared first.