What gearing for my brushless RC8T

hey guys im starting into my build tonight and was setting up the motor in it. im pretty new to electric so i figured i would ask the pros. the roller came with a 54t spur. should i switch that out or leave it? what pinion would go with it if i did leave it. top end isnt huge deal to me im just looking for a nice cool runner. i am going to be running 4s 5400mah packs with a 2200kv tork motor from a flux, as well as a mamba (flux) ESC. any suggestions will be greatly appreciated and i will post up photos as i go.