It's going to be trial and error to suit your own driving style, but here's how I'd do it:
Back the bump adjustment off to one or two 'clicks' from full soft, then set the rebound to around 50% front and rear.
Drive the car and see how it feels, if it's 'bouncy' front or rear then add a couple of clicks on the rebound until you achieve the best feel (for you).
Then you can sneak up on the bump adjustments. To accurately set the bump you'll need to drive the car hard and preferably on a track, but be warned, the track settings and road settings will be different.
If bump is too hard, the ride will feel 'choppy' and harsh. It's probably easiest to adjust the bump up until you get to the 'choppy' stage and then back off one or two 'clicks'.
Let us know how it goes.