I wanted to rush Plop, but suddenly he was faster at rushing me :D so i needed to defend first. After i win this 1v1 situation, i boomed and attacked as soon as i reached 200 pop the other highscore.
At the end, i think i could have won this earlier, if i did see this Trade Monopoly button earlier, i thought "where is it? where is it?" i thought this tradepost looking like symbol was something different :D