The rule of thumb for squid and octopus is either cook 'em very fast and hot or cook 'em very slow and low.
It would seem to me that a crockpot would make for perfect slow and low... but after a pretty good net search I can't find any crockpot or slow cooker recipes for squid or octopus.
Anyone here ever try it? A nice stew? A braise? Anything?