I'm new here and I already owe a lot to this site, so thanks in advance to everyone who reads this post!! I've read what I can, but I can't seem to find advice on my specific problem :( Since I don't know the species, and I don't know what's wrong with it, I've kind of been groping around in the dark, so please PLEASE help! Don't wanna lose this little guy!

I was given a small, potted succulent about 4 months ago. Since it was a gift, I don't know its name, I figured it was some type of huernia or stapelia, just by looking at pictures. I hope my pictures are sufficient to ID by!

Events so far:

-There were two root bundles in the pot originally. There is only one now. The other plant had similar levels of growth but had begun to sag. I didn't know what this meant, so I just continued with my usual care (water every 2-3 weeks, left to dry outside on my windowsill, never gets DIRECT sunlight, but gets a lot of light, brought in at night if it's cold or rainy). After further inspection I noticed that the spine had become dark green, loose, translucent. Research, conclusion: rot. I separated the bundles, repotted this guy, tried to save the other one from the rot but failed in trying to propagate from the bits I was able to salvage.

-Repotted in same terracotta pot, drainage hole in the base. Used original potting mix, but it got mixed around a bit. I have UNUSED store-bought succulent mix in my shed...

-Began to put pot out in the sunshine daily, only a few hours as it is fall here. Brought in later in the evening. No chance of frost.

-Been careful with watering because I didn't want to risk more rot, but realized that I am sometimes guilty of spritzing/misting, not soaking.

-Noticed a droop in the spine, perhaps there is some etiolation, as well? Again, beginner, not sure how to help! Began to spritz more, like twice weekly. Bad idea, I think!

-More drooping :( Realized that there are some dry, desiccated patches in the middle of the fingers, some tips of new growth are drying out, the overall texture of the plant is more rubbery. These dry patches are in the picture. They don't look like the rot that decimated the other plant..... Worried I'm going to have to try and propagate from cuttings again, because I failed terribly before.

-I've stopped putting him outside in direct sunshine, favoring a more shady area. Last time I misted was 3 days ago. Read that one shouldn't water a sick succulent.

-Considering repotting and changing the soil if I can make up one of the recipes I've found here, but I don't want to traumatize the poor guy! Finding it really hard to not water because I feel like I should be doing something to fix this! Don't worry, once I realized something was wrong, I stopped interfering!

Please, if you can ID the plant, or the problem, let me know if there is something I can do to help. I feel quite helpless and I'm really attached to the little fellow. People told me not to name him, because I'd become too attached, but I couldn't help it, so I will be distraught if Marmaduke dies :(

Forgive me if I have overlooked previous posts on these issues, I didn't know what to search for. O internet purveyors, in your infinite wisdom please help me and Marmaduke.

JUST TO RECAP:
Dry patches, drooping, what can I do??