Hive Leader

I believe the most sensible approach, if further development of the hard version is planned, would be to implement AI enhancements that scale with time. In other words, a player who tends to amass a large army should face an even greater challenge, making it extremely difficult to overcome in the later stages. Thus, time should be a factor working against the human player. The human player has the advantage of strategic development and combat tactics, while the AI has the advantage of army strength. And finally, give the AI access to second and third-level spells, so that there is at least some parity in the tactical aspect.