This mob isn't too bad! Broodmother itself is tethered and only melee with the occasional DOT. The newly born spindlers that spawn are red con (so easy kills) but also cast that 1min duration mezz. When the Broodmother dies, around 20 yellow underdeveloped spindlers swarm out- which is terrifying but they only hit for about 20 damage, and then easy to kill with aoe.