So olanzapine and clozapine both cause huge weight gain, have you ever considered different coping mechanisms since you describe the hallucinations as mild? In some places you can get cbt for psychosis, in others you might have hearing voices groups etc.

My understanding is only 25% of people respond completely to APs with another 25% partial and another 25% a complete failure, the remaining 25% have a worse outcome....now those numbers are for schizophrenia so the number for bipolar may be different but I’ve never seen them as there is just less research in bipolar.

For me I quit increasing my AP dose due to side effects and still had a handful of voices, but eventually those went away....but my bipolar is also under control, I just haven’t had more mood episodes past the first. But I mention this because I was willing to settle for a few voices for example over the lactation side effect of risperdal.