I've rooted a lot of cuttings at warm temperatures and without bothering to let them callous off or let initials form. My standard method involves potting up fresh cuttings in a soil mix that is at least 1/2 perlite. The mix and cuttings go in a 16 oz clear plastic cup with holes in the bottom for drainage. I water lightly, set the cups in a propagation tray, and have the tray sitting on a heat mat that is at a constant 80 degrees; the temp is higher during the day if my greenhouse heats up. The last time I did this, I had success with three different fig species: 25 of 25 cuttings put out new growth and/or roots in about 3 weeks. I realize that they all may not make it, but they look pretty good at the moment. Others may beg to differ, but, based on my limited experience, I'd say not to worry too much about those temps.