Hogan played with such a weak grip that it was virtually impossible for him to hook it. He would probably slice it big time without the supination.
If you wish to follow in his path maybe you should probably do some of the same.
Then, perhaps you need to start tracing the target line with the club head through impact. You can use your divots as a monitor. They point right today. When your clubhead goes towards right field and the club face points at the target you get a ball that starts towards target and turn left.