Don't ever bluff this guy. If you think he's even thinking of folding a K or even AQ for that matter, lol

C/r is good to use ppl's aggression against them, and it could be the right play on flop or turn against this nutso. But doing it on the river against him is burning money.

edit: Unless u have some reads that he raises donkbets a lot or something, but I don't think he does it if he has like AQ/AK here. Much prefer a c/c or c/r too.