Just a suggestion if you seem to be having a massive problem with Money (which everyone has, but your current scales make it more noticable).

Use your newfound Fire and any Earth gems you have to alchemize them into money, if you are not doing so already.

Though the temptation to keep them for a summons might be strong if you are in a situation where you lose one of your armies or he invades you to the point where you are losing alot of money it's best to alchemize. You could also do this to build another castle/lab/temple in need.