Moving to a dessert clime does make a hickory bow into a high performance machine, ...but it is usually not really an option for most guys.
I've also found that Hickory is SUPER tough in tension. Mind, it is pretty good in compression too, but the tension strength is out of balance to the extra high powered tension strength. To balance this out, here are a few tips I have used:
1] Go for an extra flat and wide limb cross section that puts the belly wood in a single plane as much as possible.
2] 'Trap' the back of the limb so that the width of the back of each limb is significantly less than the belly.
3] Heat treat the belly till it is just short of caramelization, being careful to keep the back fibers of the limb cool while doing so.
4] Seal it well after you have it tuned and tillered.
5] ...and perhaps most importantly - GO SLOW! Once set has occurred, the damaged fibers in the belly do not recover. When striving for peak performance, when working with woods that do not have well balanced compression to tension strengths, it is so very critical to never go beyond target weight or bend.
Some guys keep the bow in a hot drying box between tillering sessions. If you live someplace that is very humid, this may be needed.
Hope these help...
OneBow