I then used decoy potions to strike the orbs at 2 and 3; the other decoys I didn't need, so I just killed them immediately. The first mimic I placed to hit the other unreachable orb at 4.
×The remaining mimics I both placed at 5, with one going southeast to eventually kill the roach, and the other one going eastward, holding it in the nooks so the necessary diagonal movements elsewhere didn't screw with its placement.
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×After the roach queen was killed and the top set of trapdoors was dropped, I finagled the eastward moving mimic to intersect with my path to the red door, killing it off to drop the remaining trapdoors.