Hi,
There are differents games modes in demigos such as "fortress", "slaugter", "domination", etc...
The things that I think could be improved would be the "objectives" given to the Ai.. For instance when playing on domination, they sould try to capture/defend flags more than other actions... etc et for the other modes...
In fortress mode, I think It would be nicer if the minions would go for the fortress (from the nearest to the farest), thus the game would be much more designed toward downing the fortress more than taking out the main tower. Maybe in this case a little regeneration rate for the fortress would be necessary.