Captivator vs. Occult spellcasting archetype + personal staff

I'm playing a level 12 Arcane Draconic bloodline Sorcerer in a free archetype game (blood lords), and have been flip flopping back and forth between Bard archetype, Captivator, Psychic, and some others. I am also running Field Propagandist with Invented Vulnerability and A Tale To Believe In for third actions and maximizing deception. The rest of the party is fighter, exemplar, investigator, witch (primal), druid.

Captivator gives you slots and some upcasting, but not the ability to cast occult spells. So if I got a staff, it would have to be all arcane. Bard or Psychic gives occult casting, but not those heightened slots. I've noted that I don't really run out of spell slots often during the day, we usually have one or two big combats and then rest. So I'm wondering if it might be better to just take Bard or Psychic instead of captivator and make a custom staff with the spells I would want to take through captivator anyway. And then get some extra goodies from the respective classes.