I'm going to try get a 50% bramble precast and see how it goes if I meet someone like that again.
To be honest, most of the time, a 3.6k WW is enough to kill most mass sorbing builds. So when I go Bm by using my precast claws, I usually win. ( unless they are going to drink antidote potions I suppose )
edit: If I use gores instead of Shadow dancers, I can use a Bramble setup at base strenght still, so I'll experiment with that too if I can find a 50% bramble. Maybe it will allow me to beat those barbs