I think if the problem is that acute you will have to consider different bars. I am unsure of what bar options you have but you may have to try a totally different shape of bar.
I changed my stock bars to the lower rise version from Ducati (c/w full fitting kit). I have rotated it to comfortable for me. The result is, my shoulders are now higher, this allows for a better hand grip angle. Since the bar is the correct one from Ducati, there wasn't any problem with the cables and a sense of sitting slightly higher, thus the overall effect is a more comfortable seating position and use of the handlebar controls, for me.
Perhaps you can try a bike with an alternative handlebar from a Ducati dealer, if they're close enough to you, before you decide.