There is no substitute for a crew working the main..... has 2 free hands and plenty of leg drive to crank the main on tighter than any skipper. Also is able to trim quicker for the puffs and lulls.
This lets the skipper focus on stearing a fast line and thinking tacktics.
My crew handles the main, downhaul, self tacker jib (minimul work) and spinnaker duties.
I handle the mast rotation which the cleat is conveniantly located at my feet or hip when inboard and have set the centerboards up so they are easly dropped or raised by the skipper when he is sitting as far back as the rear beam.