Ok I have similar setup on my first ball... first... I've recommend to switch substrate... repti-bark will keep humidity very well is easy to spot clean very nice natural looking and if needed absorb misted water nicely... second
Find a store who do custom glass and plexiglass work and order yourself cover what fit on top screen (inside plastic rim) and cover 2/3 of it ... That cost me maybe 7$ and looks more esthetic that aluminum foil You use it... I had regular Large (30-40gall) zoo-med heat pad on one side without thermostat and around 1.5 inch layer of substrate to ensure that my ball dont get burnt .... plus red night 50W in the dome on other side of tank...(running all the time as secondary heat source and i like watch sometime late evening her roaring once a while in the tank)
2 hides gonna be enough but I'll recommend bigger water bowl... Preferably near dome so water can vaporize and bump humidity lvl.... I had x-large exo-terra stone dish in my (looks very natural and cool and have little steps to ensure that Your reptile can get out without drowning) but of course is your choice of brand and style...
My Humidity was all the time on 55-65% lvl occasionally I was bumping it up to 70-75% when she goes blue to ensure nice shed...
Hope that's help.![]()