Unescapable 167~168 damage wall combo.
3B, W!, 2A+BB, 66A BE, iMCF, 7_8K, 236B.
Unfortunately, one has to be square to the wall and must use 2A+BB, 66A BE, iMCF before 7_8K to get the positioning correct. I've tested variations so far and have been unable to consistently connect 236B.