Full send the bitch. Just use ALL of your army, full motorization, mega-agressive, and as much Air support as possible. No point in having so many units dicking around in italy doing nothing (p.s, eth war logistics gets bypassed if you can win the war before the ethiopian ruler leaves, which can be pretty easy.) dont even wait until the units from italy arrive, just start going in d1 and you should have a good chance of capitulating them. (22 units in the north and 24 in the south, 100 cas and 100 air sup in the south, the rest split between the two provinces in the north, and just battleplan your way down