Ok...call me a cheater...but the tactic of shooting and running works pretty well...
I know the theory of bases automatically defending themselves...however...after several years of playing harpoon..as a layman who loves the hypothetical conflict scenario but doesnt overanalyse it..I have always worked on the basis that if you leave it to the automatic defence reaction to defend your base you are buggered!
I quite like it, scramble the crap out of aircraft to intercept attacking missiles...or overload (eg a hell of a lot of SEAD in the attacking force against enemy bases...does this make me a Harpoon heathen? ( I am kind of serious about that question)