tried this "combo" for a while when I started commuting with an old MTB. then I got a hybrid bike, then finally a road bike

those bolt on drop bars were awkward cuz of the angle of the straight bars which really weren't straight. I also tried them on the hybrid but had the same issue.

I liked the high bar ends for the multitude of positions, in particular resting my hands at the very top of them, especially when out of the saddle.