*Puts on Armchair Strategy Hat*
It would a be a good idea to comprise a list of what we think Myth is likely to use.
We know that's he isn't likely to employ gamey tactics to gain a superior advantage.
We know he is likely to employ a "moderately" historical method.
finally we know that he's most likely going to attack in a area where he can bring his mobile air superiority to bear.
The only option that immediately strikes out would be raiding action in the Crimea and limited operations against the Ukraine and Causcus. Although that being said I also think that Myth could re-attempt the baiting trick in Turkey which would drain further enemy strategic reserves.
Comedy Option: Myth trains paratroopers and uses them to seize Leningrad, Moscow, Stalingrad in a 24 hour blitz