I haven’t combined them directly, but I have taken both Sertraline and bupropion at different stages in my life. I agree that Sertraline eventually takes a toll on your libido, smothering it like a wet blanket over a fire. I can also attest to some people having an increase in anxiety with bupropion because that shit made me want to claw my skin off. I always felt like I was seconds away from exploding while I was on it. It’s difficult to describe. I stopped taking it after a few weeks because it made me an edgy mess.
To overcome the lack of libido on Sertraline I just “practiced” by trying to initiate intimacy with my partner (or myself), even when I didn’t feel like it, because eventually I could “get in the mood” and it became easier over time after reminding my body that it was, in fact, fun to have sex. I also noticed increasing my activity level by working out a few times a week helped quite a bit with increasing my libido.
Eventually after changing jobs, finding a good workout regimen, and reducing my alcohol intake, I was able to get off the Sertraline and my libido came back after a few weeks.
That’s just my experience though, I wish you the best of luck.