I think it would be fair if, one or both teams don't have enough players; the one or both teams get AI soldiers to fight for them, under their command. For example, there are two teams. Red and Yellow. The Red has 30 soldiers, while the Yellow team has 20 soldiers. The AI will add 20 soldiers to the Yellow team to make it a fair fight. The yellow team will need to have more AI soldiers to counter the team who has more human soldiers. Let's face it, humans are more intelligent than the AI's we have currently in so many ways. There would be an option if you do or don't want AI assistance.
