It took me a few seconds to wake up enough brain cells to image search ‘mold risk chart’… 
Interesting doc.
I’ve always shot for 60% RH while drying (doing it right now).
So 65% RH is the limit for mold. That means I could stretch out the drying period, if I wanted…
Also significant is the lower temperature shift of the ‘no risk’ RH from 72% to 66% (60 vs 70 chart). That’s telling me I could slow dry at a higher RH.
I suspect the only way to test for benefits would be A vs B…
I’ll put that on the roundtoit list… 
Cheers
G