Those Deep One and Octopus God Cultist conversions are a lot of fun. Very nice work.
You end up with a bunch of extra squid heads out of the packs anyway. I've used some as decorations on altars, etc.
I was going to try some Deep One heads on the robed cultist bodies, but Khurasan is supposed to be releasing the Naga cultists (serpent men) and it looks like
those can be painted as Deep Ones.