purple front pink rear works great, that's what I run. as far as track temp..when it's really hot I don't use as much traction compound as when it is cold, sometimes none at all. tire warmers can help if it is really cold. I always run the same compounds though.
64 pitch gears are better due to the smaller increments that you can change your gear ratio. I use Kimbrough spur gears and RRP pinions