I have the same valves in one of my bathrooms and I set it up the same way.

hot and cold supplies to the PB valve. Mine has two inlet (one hot one cold) and two outlets (one top one bottom). The tech from Grohe told me it's for convenience to have two outlets, they expect one of them to be plugged. From there I take it to the five port diverter, two inlets, three outlets. The two inlets again are for convenience which one you use, the other one is expected to be plugged.

The diverter than gives you three outlets. One for overhead, one for hand shower and one for tub. On one of mine I substituted the tub for two body sprays.

There is no combination. In my case I do not believe I have enough pressure to do combinations, if you do you can use thermostatic valves with individual volume controls to achieve the combination and no need for a diverter.

The only thing I would say is to make sure which port to use for which device. If you buy the Grohe diverter trim, the trims are labeled, overhead shower is in the "northwest" position, hand shower "north east" and tub "south", like this:



you want to use the corresponding outlet otherwise the trim might end up with the wrong label.

Also set the valve depth from the finished surface according to the plastic template.