After reading your comments, the first thing I would do is start working on your in-boat communication. You definately want your crew to cleat the jib and handle the mainsheet. You will not be able to helm properly and run the mainsheet at the same time. Learning to trust each other and developing the teamwork onboard is a large part of what I enjoy when sailing the Tornado in big air.

I think you are spot on about how deep sails in strong winds make your speed peak too soon.