You have two UTHs? It's not an issue I'm just making sure I understood correctly.

Either way I would set the hotspot for 88-90. Anything over 90 is not needed. If you have a second I would set it for 80-82.

Also if it were me I would place damp moss in all the hides. I did that before I kept my collection all in one run and added a humidifier. The damp moss gave me perfect sheds even with a 100w heat bulb and 100w CHE..... I keep a cold house.