I have a 913 D3 with Oban Devotion 6 stiff shaft.

I was fitted for it at St Ives looking for a shaft which would give me fewer (or ideally no) duck hooks. The fitter chose the Oban as a shaft with a smooth feel and a decent amount of torque. I have managed to hit it pretty well since with a straight flight and even an occasional fade or two, which is great. 

On the Titleist custom shaft chart, it is marked as a low spin low trajectory shaft. Low spin perhaps, but I personally haven't found it to be particularly low trajectory. It works very well with the D3 for me and I have managed to get some pretty long drives out there.