darn I only have 558 diamonds, what's a good way to get more diamonds?

Well you have until November to get more diamonds. That's plenty of time. The easiest way is to buy directly from the site using USD but that's not always an option for people. The 2nd best way is to buy from players using the currency exchange. The exchange rate varies but you can normally get them for between 2k-2.2k per diamond. Diamonds are also sometimes prizes for forum games. But that's not a reliable method.