Ok so I got some interesting results.

I installed Darth formations 8.5 which is the last version that is compatible with 1.2 mods.

There were some good changes but I'm not sure it worked exactly as it's supposed to. The units now do advance in a much more sensible formation and once engaged the AI makes more attempts to flank you. However in one of my battles there were still suicidal generals and archers, which I thought were supposed to be fixed. But a very big problem I had been having with reinforcement armies has now been fixed and that alone makes this a success. Now when an army is reinforcing my enemy or me it doesn't do the stupid "split up all the tropps and walk to random places on the map" thing. one of my first in game battles was my full stack against 2 makedonian armies. I got completely trounced but was very happy because both armies had attacked as though at least trying to work together. So While this may not have fixed everything bad about the AI in battles I feel it certainly improved my gameplay so for now I will be keeping it