The dual 11" guns for germany are for the moltke PCA since it has 4 gun slots it evens out at higher levels despite them being pillow cannons. Use the triple 11" guns on the Dland and P-Pro.
Then on the P-Pro2 use the triple 11" L's and the same single 11" L to have similar range and fire 8 shells still. Plus the D-Land and P-Pro are great AA ships.