IMO, Grey ghost nailed it. Normally, when just clipping the edge, I might shoot a little above center to get the cue ball to run towards the far rail away from the 9. At this angle, it is key to play more center and get the nice bounce off the rail. This is a tough shot for pros also. I think a pro would leave it steeper so it is just a fast cut.
At some angle, you get to a trade off where you shoot stun with inside english to skid to within 3 - 4 inches of the rail and die coming off the rail. Then just live with the long cut on the 9.
I had one of these last night. . .a shot with no safe and sometimes it is hard to bring it with the big stroke needed for the win. Damn game anyways. That is why it is best to shoot most shots with good speed so bringing it doesn't seem like so much stroke juice. When I practice, I always practice how to get my leave with a medium stroke so both juicing it and hitting slow aren't to far of a reach. Slow pokes win a lot of games, but then when you have to bring it, it is a big adjustment.