I haven't finished this hold yet, but here are some comments.
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×City of Lenary: 7N4W - If you clear this room and exit west, you're stuck.
Tar storage 2S, 4S, 5S - Tarstuff-related backtracking problems.
Aumtlich territory 3N1W - The pressure plates ought to toggle the doors instead of opening them. Otherwise this is trivial.
Aumtlich territory 4N1W - If you leave to the east without clearing the room (use mimic as shield), you're stuck.
Palace of Mirrors 4S1W - The eyes can still be killed (at the corners) even after being awoken.
Palace of Mirrors 4S1W - You can back off and step on one of the sword tokens multiple times, so you can use your sword on the island.
Palace of Mirrors 3S1E - This room seemed way too tough for this hold. Guess I probably overlooked an easier solution.
Palace of Mirrors 3S2E - It's possible to get the slayer to step on the pressure plate, so you could take the north passage. If it went anywhere. But it doesn't.