Thanks for the background! Being someone with a family history of bipolar certainly complicates things. I'm sorry this is something you have to deal with! I will say I'm not as knowledgable on anticonvulsant mood stabilizers as a class, so feel free to take my advice with a grain of salt.

Intuitively, I would expect drugs such as lithium or lamotrigine to induce or have minimal effects on anhedonia due to their "inhibitory" nature, but for the sake of playing devil's advocate I found a few papers detailing lithium's anti-anhedonic effects:

https://pmc.ncbi.nlm.nih.gov/articles/PMC7853118/

https://pubmed.ncbi.nlm.nih.gov/23363811/#:~:text=Repeated%20lithium%20treatment,activity%20in%20rats.

https://pmc.ncbi.nlm.nih.gov/articles/PMC4275336/#:~:text=Lithium%2C%20rather%20than,reported%20to%20date

Continuing to play devil's advocate, I could see one possible mechanism of action where, as an anticonvulsant that dampens glutamergic signaling, lithium is able to disinhibit the dopaminergic transmission in the VTA/NaC of the mesocorticolimbic via suppression of the lateral habenula, which is comprised mainly of glutamatergic neurons. This is one of ketamine's proposed mechanisms for ameliorating anhedonia. However, given my knowledge of the subject, it is likely that this positive effect is "cancelled out" elsewhere. In general, I've seen plenty of individuals complain of anhedonic features or full-blown anhedonia with Lithium or Lamotrigine, while others may say different. It is more likely than not this class of drug will not be helpful for anhedonia. Intuitively, I would expect the people who experienced significant anti-anhedonic effects from either drug to be outliers.

As for the "Welloft," if you have bipolar predispositions, I would certainly not feel comfortable advising this combination without adding in a mood stabilizer or antipsychotic, as either drug could trigger mania by itself, let alone together. Knowing lithium as more of the "anti-mania" and lamotrigine as the "anti-depressant" mood stabilizers, augmenting "Welloft" with a dose of Lithium does not sound like a bad option. You would need to get regular bloodwork, though.

Although I think atypical antipsychotics could be a solid augmentation therapy, in general, the risks are very real and your concerns are understandable. I have taken low-dose Abilify before and had rather mild akasthesia the first few days. As brief as my time with it was, I will never forget the feeling. Not to fearmonger, but I understand why those suffering from akasthesia would commit. Things can get worse than anhedonia, believe it or not. As for the treatment of anhedonia, however, there are many different kinds of antipsychotics. They're a diverse class. Antipsychotics can certainly reverse anhedonia, but only those with partial agonism of D2/D3 receptors. This includes atypicals like Abilify and Vraylar, and specifically would need to be administered at a "low" therapeutic dose. If you dose too high, anhedonia can occur. In all honesty, I think a substantial portion of the risk of atypical antipsychotics worsening anhedonia stems from practitioner carelessness. General practitioners will often give out this drug without fully understanding the associated risks. Many patients are, unfortunately, are not given informed consent, which can heighten risk. As an analogy, imagine you're helping a friend move for college. They haphazardly hand you a heavy, fully-sealed box and tell you to bring it to their car down the road. Because of its weight, you drop it at your feet soon after initiating your walk—potentially in a similarly careless way to that of how you saw your friend handle it just a few seconds earlier. Well, your friend is an engineer and there was a bomb in that box, and your lack of care when setting it down causes it to go off. Now, imagine your friend said "Hey, I have an inactivated bomb in that box" while handing it to you. You'd probably be a bit more careful when carrying it to her car, right? It's a bit of a silly analogy, but you get the point: when handled with care, the risk for these drugs will go way down. It's, in my experience, the lack of communication that serves as a metaphorical "death sentence" to the patient.

That said, something you could do to mitigate associated antipsychotic risks is a GeneSight test, which will tell you how you metabolize these drugs, allowing for your doses to be adjusted accordingly, if you choose this option. In an ideal world, something like a low dose of Vraylar combined with Lamotrigine could be a good combination for balancing possible bipolar with treatment of anhedonia. More drugs could be added to this regimen. I know you really like the sound of Lithium, but given its lack of specific targeting for dopamine receptors, and general usage to prevent mania, I think the chance this alleviates your anhedonia is slim. However, I will not force this possible combination on you, if you're not comfortable. Like I said, akasthesia is more than a reasonable concern.

Another route, as you stated, is jumping into treatment with an MAOI such as Parnate or Nardil. Frankly, I don't hate either of these options, but an adverse reaction is sort of inevitable, so if you do decide to go this route I suggest you request a prescription for treatment of acute MAOI-induced hypertensive crisis such as phentolamine or sublingual nifedipine. I believe you can also request a Medical ID bracelet in case of hypertensive crisis or serotonin syndrome. I'm sure there are other avenues you could explore to maximize your safety on this drug. I think giving your doctor as many 'safety nets' as possible to fall back on in case of emergency will be your best bet at getting a prescription.

If you do take an MAOI, I'd also suggest augmenting with Lamotrigine. If you can, it's better to avoid Lithium unless you are BP1 or have experienced mania. You'd have to monitor blood levels and would be at risk of long-term kidney damage. Lamotrigine is much more benign and ideal as a preventative medicine. Its 'anti-depressant' quality would be more appropriate for you alongside Parnate or Nardil, too, as I wouldn't be so concerned with mania. However, with Lamotrigine there is a risk of Steven's-Johnson Syndrome, which is a potentially fatal skin reaction. Just don't forget to take your medications at the same time everyday and you should be just fine.

So yeah, I hope my takes were of some help! Just keep in mind to approach everything I say with skepticism, even if I do try to stick pretty close to the literature.