Keegan, clearly everyone here can relate to your desire to maximize sail area downwind and to keep it simple. Flying your downwind sail from your windward bow is one of the great benefits of sailing a multihull
- no poles, guys, topping lifts, downhauls, etc. to deal with!
After a fair amount of experimentation (luckily with borrowed sails) we settled on two sails
that cover us for most wind
conditions. First is the standard asymetrical spinnaker which we fly off the windward bow and launch with a sock. This is good for 90-150 degrees apparent, depending on wind
Our second, and more-often used reaching sail is a Code-0 which we fly from our extendable bowsprit
. We use a furler
for this sail and it fills the gap between our tiny self-tacking jib
and the asym. This sail can point as high as 45 degrees in very light air to about 110 degrees. We've also used it downwind, tacked to the windward bow (when we blew out the chute!) and it did quite well. This is akin to what you are asking about flying a reaching sail (screecher) as you would a downwind sail (asymmetrical).
Obviously, I've decided that I'd rather change sails
than push a sail out of it's intended range. Hey, it's cruising - what else do I have to do?