(for 1vs1) attack the 20s between your 40 and 50 and fort to one place. keep deploying and forting untill your opponent takes an s, then you take an s aswell and auto his stack, and take the unprotected shop and house.
How do you time an attack in a big city mogul game???
example Game 5039108 some players have taken thier Subway. If I attack now, what's to keep somebody from coming over the top of me? Should I make sure I attack last???