Welcome to Triathalon race developement
In the world of human powered boats, the Trampofoil reigns supreme for oddity. Maybe combine it with a small kite.
If it wasn't for the fact that you can't water start I'd be queueing up to buy one of those! 
Wait til' you see the look on those fish when you go by on that in scuba gear though. 
Someone apparently took my comment about tiller extensions to heart because I'm told that there are some new high-tech-low-weight-easy-locking hiking sticks now available.
Flying off shelves!
speaking of hiking sticks...mine is pvc tubing: very light, cheap, flexible, and effective. the tubing was forced over the cut off inner 1' end of the original H16 fg extension and fixed with a machine screw. the outer end has a pvc end cap cemented in place so it can't fill with water.
"speaking of hiking sticks...mine is pvc tubing"
what about telescoping?