Round table

I kindly ask anyone who can to analyze the save file to see if there was a better way to approach the situation. I lost and can't understand what I did wrong. WT, game against Sup, I'm blue with a +3700 Castle against his red Necropolis. http://zalil.ru/32577919 P.S. You don't need to look at the battle losses, I'm only interested in the tactical moments.