What is the best government for attacking?

tyranny uses only 1 turn to attack so more turns to be used to gain readiness and growth and it gains 20% more on attacks.

dictator uses 2 turns to attack so less turns needed to use to gain readiness and growth and dictator has 25% more effective military than on other govts and also 33% better ghost acre gains.

If you are attacking to kill, then Tyranny is best. If you are trying to break a larger opponent, or are just interested in a more powerful country able to withstand grabs and launch more effective, and profitable land grabs {ghost acres} then Dictatorship is where its at.