Ok tried the dehumidifier in my lung room for a week and things worked out rather well. My only issue letting the environmental controller use the ventilation to control humidity and temp is that high humidity caused extended run times and in turn drove my low side of the temps down to 65, the temp of the lung room.
So even though space is cramped I put the dehumidifier into the grow space itself and unlocked temp and humidity on the controller. Now I'm having significantly less run time on the dehumidifier as it's working a 70sf space, and my temp ranges have gotten much better between 82-74 (80 max with 6 deadband on controller). So the lie swing is eliminated now and humidity levels are staying 40-60 (60 with 5 deadband on controller).
And minus the start of the grow where I was severely underestimate due to my newbness things are really coming along now with my 6 auto ladies.