It helps to be young for the 30knt pus stuff, and the water sort of flat. Other wise a 4.2-4.0 on a wave board would be the ticket even in big surf.
or some sort of ocean going boat double reefed with a 90 percent jib or something like that.
A 14 main is just a hair shorter than a reefed 16 main. It worked for us since you can still downhaul it ok. I can't imagine that the sizes have changed since the 80's when we used to rig one of the 16s with the 14 sail.