Well, he sure doesn't look like a fluffy to me, but heh...whatever works for you!
I keep all my boas, which i have a mex too, with a hot spot of 90-92 and a cool end of 80-82 and a ambient temp of around 85. I'd suggest you do the same...up the temp a little if anything, but don't drop it any more than it is. Boas don't need the higher temps that some others do, but they do require heat...so don't remove the heat. Nice looker by the way!