The problem it's not just that is completely ahistorical to fight in the Sahara, it is also that the battle planner performs horribly when it doesn't have enough units to fill the front. Africa is a gigantic front with low supply so you will have a hard time filling the front. This means you will have to constantly check that the AI has not allowed some of your divisions to be stupidly encircled (Seriously a couple of patches ago battle the planner AI managed to get 2 Modern armor divisions encircled and destroyed in Africa while was focusing on another theatre).
I think that if right now I had to play Italy without NMN I would take Suez Cannal and abandon all Africa (including Ethiopia and Libia)
I think that if right now I had to play Italy without NMN I would take Suez Cannal and abandon all Africa (including Ethiopia and Libia)