First of all, boas are nocturnal so the UV bulbs are doing no good, but giving him a sunburn.
The hot side of the cage should be 88 degrees on the floor and NO hotter. The cool side should be 77-80 on the floor. Humidity should be higher than 50%. I like to keep them 55-65% and higher during shed time.
Night drop should be about 8 degrees.
I never feed in the cage and always feed f/t. I have a large Rubbermaid for feeding in. This keeps the snake from associating things coming into the cage as food and cuts the risk of impaction from substrate.
Cohabitation of reptiles isn't a good idea. They are not social animals. This will only cause stress (unless you keep denning rattlers. lol
) You'll have trouble knowing each's natural cycles and if you do a fecal you'll not know who it came from, so both animals will need to be treated. If you put two adult boas together you will have mating snakes. You're not at a point to be doing any breeding, so don't try that.