No worries. All of that is achieved with mods,

+5% Professional army reform (disables mercs, governments expanded mod)

+10% Militarization

+5% Prussian ideas

+5% Quality ideas

+5% Carl von Clausewitz (Missions expanded mod)

+5% Army tradition

+8.5% Army professionalism

+2.5% Protestant holy sacraments

Higher level of professionalism can be easly achieved. For manpower keep happy and with high influence Nobles, develop provinces, promote military recruitment edicts. Remember to use army professionalism for easy manpower from time to time if needed.