Sorry to say that's the million dollar question. The manufacture for the WDH and Ram unfortunately just reference Front Wheel Well Heights. Don't know why the WDH Manufacture or RAM for that matter give an answer to your question. I have a Andersen "No Sway" WDH which I spent some time tweaking the adjustment to obtain equal front and rear/drive axles. Personally I think when the weights are equal front and rear it seems to drive differently. Fortunately I can easily fine tune mine by pulling over to a parking lot.
I just took a cursory look at your instructions and I see there is nothing special about setting hitch head angle like some other Hitch manufacture's.
But I did see this in Blue Ox Pro Installation Manual Note: Ram Truck owners please reference the Trailer Towing section of your vehicle owner’s manual for proper hitch set-up instructions. Also, it is recommended for optimal towing performance to set the ball height 2” higher than the top the trailer coupler.
Just curious if you used 0 to 1" or the 2" per the note.
Also do you have the correct spring bars for your CAT Scale Tong weight vs Travel Trailer Manufacture Spec weight which is off by hundreds of pounds. If you have 750lb spring bars that maybe your problem and need to step up to 1,000 lb spring bars.
Again your mileage may vary, See a sample of my CAT Scale