The slice is caused by an open clubface, PERIOD. Now, people will do all kinds of things to compensate for that, OTT, CAST, hanging back etc. Maybe a flatter swing reduces a slice, I don't know, IMO one plane, two plane is smoke and mirrors. If you don't open the face too much on the backswing and downswing, you won't slice. The hips rotation and the proper use of the forearms/wrists is the key to clubface control.


Go forth and prosper.