Hot spot should be at 90-94 so I would raise it just a bit. Also using cypress mulch cash help give you alittle more humidity.

Misting moss inside the hides can create nice humid hides during a shed cycle. That is what I do and always have great sheds with my tank usually setting between 40-50%. Misting the moss in the hides will give them what they need and since that is where they usually are it is where it matters.