You should house the two royals in separate enclosures.
Temps should be 90-94 on the warm side, and the cool side should be 10 degrees less. A night drop is not necessary.
Ideal humidity is 50%-60%, but in the 40's will work fine, too....just be sure to bump it up some (or provide humid hides) during the shed cycle. You should not need a fogger to maintain proper humidity...using one can make things too wet and lead to scale rot or other health issues.
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