So having just started the game, what is the best use for diamonds? Energy refill? I can't seem to see anything else really to spend diamonds on. But there might be something later that uses them, so saving them for that would be the smart thing to do. But most games I've played using them for energy refills is the right thing to do, and not to be tempted by quick other things.

So I figured I would ask those much farther in and experienced with ftp what is the best thing to do with them. Thanks! ^^