I would run 6s and something in the 1600-1800 kv range geared for around 40-45. Temps should be cool and the setup very efficient. It will also be a blast to drive!
Revo is heavy, you need a big motor + low Kv high voltage to be efficient.
Tekin T8 truggy 1350 kV + 6S lipo geared for 40-45 mph will do the job very well ;)
Inferno VE MMv3 NEU-CC 1515/1Y 4S "Flying machine"