I've seen deformations in various kings and milks from too high incubation temps.

I think anything higher than 84 is risky.

Personally, my temps vary from a peek high of 84 F (during the day) to 75 F at night.

Yes, it takes longer for the eggs to hatch...but the neonates come out HUGE and healthy.

Just something to consider.

Also, too moist is a killer...keep a close eye on that as well.

Good luck!