What's a good medication or mix of medications to treat bipolar disorder coupled with insomnia?

Titration should: be individualized to you. You see how the medication works for you- it is effective? How is the side effect profile? Your psychiatrist will help to explore this with you. Bipolar disorder Tx Meds fall into classes of mood stabilizers (Lithium​/ anticonvulsants like valproic acid, divalproex or lamotrigine) & atypical antipsychotics (Quetiapine, aripiprazole, olanzapine or risperidone).

Many options!: Seroquel (quetiapine) doesn't make you tired? That is often a good choice for bipolar disorder. Are you exercising and following the "sleep hygiene" recommendations for insomnia? Do you have a snoring problem (possible sleep disorder)? Sleep medications are often addictive and so I would avoid them as much as possible. Perhaps a med like trazodone would be effective. Ask your psychiatrist.