The problem with the priority purpose of the enemy units

[yualexey]

While attacking a building enemy units do not switch their attention over to something with higher priority. For example if enemy units attack the central (main) building, you can create peasants and repair your building.

[feneur]

I'll close this as invalid. First, once capturing buildings is implemented the same units should never attack both buildings and units in the first place. Second, I don't think cases like this is a simple matter of priorities anyway. After all, if the building is about to be destroyed it's probably more efficient to destroy it first and then kill the enemy units (since they would be able to use the building a bit longer otherwise). Things like this should be up to the individual player/AI to decide.