I don't have any specific builds to recommend for you. But I can at least offer a few tips that may help, because I have a similar neurological debilitation & I have to make a lot of adjustments to how I play because of that. Plus I once suffered a serious injury to my right hand in a kitchen accident several years ago; and the same as you, I used Median XL to regain most of that hand's function again after that.
Just play whatever build works for you now. But I'd generally recommend playing ranged projectile builds, because their more slow & cautious, kite-and-shoot playstyle can be less intensive and demanding to play.
Depending on how difficult it is for you to play Median XL in your condition now, I'd also just play some simpler Diablo-clones for now. such as Torchlight II or Diablo III, just to regain some basic building blocks of your function in that area first. Then use that as a stepping stone to being able to play Median XL again. E.g. start with any of the Demon Hunter builds in Diablo III. Then work towards playing a Bowazon build in Median XL next.
Then just stating the obvious here: Min-maxing that Bowazon to use as few button-activated attacks & skills as possible can help a lot, too. Plus I'd only play in solo-mode for now if you aren't doing so already, so that you can just play at your own pace, & just gently push your progress with less risk of aggravating your injuries.
Depending on what app you are using to play Median XL on a tablet, also set up your buttons if possible so that you can simply toggle the 'display loot' and 'stand in place' commands on or off with a single press.
On a similar note, you could also just settle for playing something else with a gamepad whenever Median XL becomes too strenuous or untenable to play. I often resort to that too, whenever my debilitation becomes worse.
Above all, just relax & have fun: because so long as you don't overdo it, playing something like Median XL can also give you some much needed stress-relief during the rehabilitation-stage of recovery: & that is going to make it easier for you to get through your recovery in the long-run.