After my first (frustrating) time fighting the Death Shepards, I used Sleet Storm at the choke point. They kept uselessly (and hilariously) falling, as I picked them off with ranged. Combo-ing Sleet Storm with Hunger of Hadar is even better.
Yes, that should be a fun combination. I just now did the same chokepoint tactics in a corridor of the creche Ylek. Hunger of Hadar to block the youths and their mentors, but now Tav had the sparkswall ring and the watersparkler boots. Shart cast create water to add the electrified surface in the hunger area. It doesn't really add much damage. 3 or 4 HP. But it's a joy to see those overpowered enemies struggle and get their just return.