Early attacking is the only way to go on higher difficulties, Until last week I was a monarch player, when I began and won my first empororer game with roosevelt. The most satisfying victory in battle I have ever had was sacking a 19 population istanbul around 300 bc, which had 4 food resources and 2gems, a shame it only had 2 archers and a spearmen. Long story very shortened it was a 1752 space victory coming from a gigantic tech disadvantage. The interesting thing i noticed in the final score were the units I produced.... 88 axemen, 29 lost and 18 still in commission at the end. With that 23 cats 4 trebs and 11 knights I conquered mehmed, elizabeth, and napoleon all by around 1100 ad with mehmed and napoleon both dead by 100 bc. The key to victory was diplomacy, catherine ended up with 2 capitulates by the end of the game, but saved me from destruction twice. Catherine is with out a doubt the best ally you can ever have, she will not go for a diplomatic victory even if she is near the population to win it alone, just countless stupid resolutions, and too much military/millitary research to even compete space wise(although I was at 56% landmass).