Temps Humidty Optimization, Worried about mid/late flower

Temp/humidity should be reading from the top of the canopy level. The humidity at the top of a tent will be 20-40%rh higher than at the bottom, humidity rises. I have no idea about celsius its too inaccurate for what I do with cannabis, I'm used to Farenheight so forgive me. Optimal LST leaf surface temperature for maximum photosynthesis is 86 (Given all 9 cardinal rules in balance). Trichomes will start to degrade above 87. Manganese (Vital for flowering) will have great difficulty uptaking via roots below 64 If your not going for purpling, night temps should not go below 67 Once past ripening stage (terpenes such as myrecene) start to decay above 67 There is no right or wrong to grow, what we try to do is optimize as best we can. RH over 65% will inhibit the photosynthesis as the stomata (little tiny mouths) will close to prevent from drowning as air becomes so thick with moisture, with no way to perspirate, the leaves will become laden heavy with water, left untreated can lead to multitude of problems. Humidity is not the problem, stagnation, or lack of change..............we need airflow Measure the cubic footage of your grow tent 4x4x6 = 96 So you would be recommended to get a 100CFM (cubic foot per minute) So the idea being I would clear that tent in 1 minute at 100cfm. (Double cfm if you add a carbon filter, and add 50cfm per 6-8ft of ducting) Personally, I run a 400cfm to run for 15 seconds every 3min this more or less strips the tent of all the nasties before anything can set in. You want to try and have a slight negative pressure to the grow space too, the tent should appear to breathe. Eveerything is looking good! Best of luck.