There isn't much way, but if you are Korea (for Imp) then getting masses of inf and canons is a good shot. For Med, China and getting Elephants is as good a shot as you are going to get, I think. Of course, you need other types of units for Imp, Med and Gunpowder, but the main parts could be what I said.
"It seems to me the humour of Sails is so dry you could strike a match on it and it would be the humour that caught fire." - Friend of Old