The worm hits significantly harder post enrage now, it’s still doable but you have to whittle both Turgar and the worm down roughly at the same pace (After removing all 9 of his stacks). Turgar’s fel blast starts getting lethal around the 6-7 minute mark, by which point you should be able to have the worm under 50. wait for a worm cast to go out, push turgar over, pop everything you have and burn the worm making sure to have a mitigation cd up for each of the worms post enrage casts. Should be able to handle 3-4 of them before either you die or it does.
Again, much much much harder than it ever was in Legion, and I would definitely expect it to get nerfed, but doable, and if you enjoy that level of challenge not something to shy away from.