If you build a factory in Cairo as UK, its great!! If you can get away with it, which is hard. The best way to do this is to save your transport, not worry about Greece, combine your fleet, bring up some reinforcements from south Africa, and land as many allied aircraft there as you can by turn 3 or 4. If you throw down a factory there by turn 3 or 4, then you have Africa and a sizable fleet to help protect India one the good ole USA puts the vice on Italy.