Memory of Flame plus Gravity Well. If a flame circle is in the middle and you get pulled in, even with a drone gadget preemptively cast to clear the knockdown you still die because those flames circles do insane damage. Unless we’re expected to carry immutable or thick skin or run 100% survivability, I don’t see how this one is considered a viable combo.
Edit: 25% survivability + thick skin still was only barely enough when I got pulled into two fires overlapping in the middle.
Edit2: Let’s talk another one. Blood Threshold + Blood Ritual. I assumed that the casts would not overlap. I was wrong. They can and they do. Until today I haven’t had any issues in DA regarding bad combos. Now there have been two.