Get far enough in the game to have a Dancer, two Merchants and a Hero on your team. Upgrade the Hero and Dancer to so the Hero can use Bladeblitz and the Dancer can use Applaud. Equip at least the Hero with a good weapon (and I suggest good armor for all just in case) and add the following abilities to your team. Merchant- Finder, Merchant- Finder, Dancer- Applaud, Hero- Bladeblitz. I advise putting them all in the same place so as to speed up the process and you can even turn the merchants and dancer into animals to further increase speed (though I wouldn't advise doing this to the Hero as it seriously docks their strength.) Now simply go and kill enimies wherever the right gems drop best. The Dancer supplies Ap to the Hero who kills all the enimies with Bladeblitz and the Merchants collect extra gems.~ I'm sorry if this doesn't work out on your games the way it does on mine. I obvioulsy only have the single game and haven't been able to check for accuracy across multiple games. If anyone has found a better way, please let me know.