Blue beauties are amazing, what breeder did you get her from.
My love is asian ratsnakes, and they have a common range of care requirements.
First you really don't want her hot spot over 85 ever 82 83 is perfectly fine.
2nd I don't know how big that tub is in inches but I think the blue beauties might be the biggest of the asian rats.
3rd- 70 percent is really a better aim. But you'll be okay with 60 try to provide her a humid hide though, asian rats love those. Just get a tupperware dish, cut a whole in the lit, fill with sphagnum moss and mist daily. Try to find one with a colored lid. an opaque one is even better.
Here's a good site with some nice info
Ratsnake Foundation Page
Congrats again on your purchase I am envious. I haven't been able to find one.