yeah, I would try to stick with a mid temp like 80ish or something like that and just know that when the lights go on it will get warmer, and with the lights off it will get cooler obviously.. I have been trying to combat really high humidity even though I have a couple different fans running, 1 on all the time when the light is on, then 1 18" oscillating fan that is on for 15min every hour, and every other 15min for 15min when the light is off, and then the inline exhaust fan which is on every few hours when the light is on, and every hour when the light is off.. because when the light is off, the humidity shoots up..
and with that said my plants have been kind of wrinkely.. but I just decided it has been warm enough, and nothing else has really worked really well, so I just unzip the top flap of the tent (since my tent vents are on the bottom and don't vent passively very well) and even after a few hours of having that vent open.. it seems to be doing the trick.. so I will see if a few more days to see if it gets better.. this is my first year from starting inside.. so I'm kind of juggling things around to make them work... you'll have to do the same to see what works.
I suggest going to walmart and grabbing one of those humidity and temp sensor things, the one I grabbed was like $10 and it is a whole lot easier, and much nicer being able to know the humidity, when before I just had one of the thermometers in there, which was OK, but the digital double sensor is nice