I am unsure what you mean here, but the game levels you up each war level per war, so if you fight a level 3 c3 you will be a level 4 when you win. You never stated anything initially with "experiment with war engine", so thats were i believe to note: am i missing something?
Anyways the game is changing at times and until theres a good war medium for the engine things will be changing.
Though if you have questions about war read documents, the simple "Aries war guide" though i should make one since at this point it is out of date.