You have a great handle on the situation.

I would bump the temperature on the cool side to 80 degrees.

If both snakes came from the same person/group: the fact that one is in much better condition than the other suggests that there is an issue with the snake with the stuck shed. My guess would be that she is a non-eater and probably still requires assist feeding (that hasn't been performed by the previous owners).

1. The male does not look Enchi to me. I see traits that are sort of Enchi-ish (minimal blushing/odd banding), but, not quite.
2. I would watch for blood in urates or constipation indicating a blockage.
3. I would place a large water bowl partly over the UTH, and let her settle in. For the shed: I would toss her in the water bowl daily until she gets the shed off. I wouldn't force her to soak in the water or try and pull off the shed.
4. I would offer her a live mouse hopper (once her shed is off). If she refused: I would kill the mouse and assist feed.

These are all just suggestions based on the information presented: Best of Luck!