Perhaps, by the 11th month, even with adjustments to the army size settings, you'll find that the number of small units in your army becomes excessive.
In your case, I see two options:
1. Use a program to edit save games (it's easy to use). I think this is the preferred option.
2. If you're a very honest player, you should complete the map much faster. If this is difficult for you (in terms of speeding up the process), I can send you a detailed guide for almost a speedrun, right up to Yogores and his captive.