There are a couple of ways to get rubies that I don't see mentioned here. The video adds for rubies will provide 15/day. It can be frustrating for some to get them but certainly pays off. You can also fight the pirates that float around in Asgard. Doing this at least twice/day usually nets me 5-6 rubies/wk. You can also spin medallions with the World Traveler in Montezuma for the occasional ruby.(On this you have to read the treasure results instead of depending on the picture to show when you have received a ruby). Luke Blue said, these merchants pay out double the regular decos so are worth it. I advised my guildmates to purchase these before regular Decos. Hope this helps you save up faster.