Thanks for all of the input.
The solution I came up with after reading all of this is;
16% Stables and 10% Training Grounds.
The 16% Stables gives me 1 Horse for each of my Elites, and the Training Grounds will modify BOTH my Elites and my Horses.
So, in the end, I end up with an Offensive Power Output of about 10.44 for every mounted Elite. That's including all of my Bonuses(TG's + 200% Wages) and 4 Generals on each Attack.
So, again, thanks for all of the input.
It really helped me figure out what to do.