Actually decided to do Lemmon tomorrow. I am still in between on the 5.6s or not. I am leaning towards the Enve’s just because of how predictable the descent is.
I’ve done a nearly identical descent in the Sierras
profile looks like Mt Lemmon:
Mosquito Ridge is an 18 mile descent at -5%, its a logging road with really nice pavement and very few switchbacks. The day I did it the temps were 55F at 6000’ elevation and then a front moved in and it dropped into upper 30s while descending. Chilly!!