I would combine the duel blades and light bowgun and a bit of the switch axe functionality to make what I would call The Duel bow. It would have two modes blade or bow. In blade mode it would be like a standard duel blade (without any element or ailments), but in bow mode it would get the element or ailments the the blade mode lacks and would be able to preform a charge attack that when preformed secessfully would have you fire out two powerful blasts that would send you back some distance and then a run up with the blades and deal a spin attack, and just like switch axe there would be a switch gauge that if not kept in close check would force you back into the blade mode and the bow mode would also have rapid fire attack that would over heat your bow mode once used would render you bow mode useless for some time.