Workers

there is to few workers, i hope they will make you lvl up your mainbuilding to lvl 30 or something.(i would pay coins to lvl up mainbuilding)

sorry but its unlikely as the number of people limits what you can train which means you have to attack people to be top ranked.

I'd recommend making more cities and getting level 20 main building in them. Usually with enuff cities you don't run out, although running out is part of the game, and keeps you from having massive armies immediatly