It seems this would be more complicated than I thought. We might have neglected to mention that since this is an ongoing campaign, so dipping into something into a class that isn't favored would be complicated. At least, changing the favored class would cost the same as 1 LA, which would be less than ideal.
I still very much like the factotum class, it would be nice to keep working around that. I'm currently looking to see if there's other cleric domains which would be helpful, as that knowledge devotion looks quite helpful, though having a dip into something else, if anything, would be ok too.