U need to play around with the rocks u hv & remove those that u dun need & choose the scape u like. Of coz u need to shape it by stacking to create caves and crevices and valleys to allow water to flow thru to minimize dead spots.
The shape of your rock scape will also affect what kind of corals u be able to place on it and movement of water thru it and also allowing fishes to roam and had hiding places & own territory in your tank.