Emrakul
Are you sure you want to be RUG tokens? RUG is a great color combo for Goodstuff/midrange/control/combo but decks with g/w are better baselines for tokens. My advise would either be g/w or junk.
Blue has lots of copy effects, and thanks to Echoing Truth, can have some really funny bounce reactions thanks to the new Legend rule.
Green, as always, has lots of tokens, and Red, well...honestly, I'd really like to see someone drop a Goblin Warrens in EDH at least once. Sure, it's mana hungry, but it's a crazy fun token card for the color. Maybe people are just too mature to do it.
Anyways, I'm not sure "Tokens" is quite the right name for the deck as it seems to be forming up. "Clones" might be a better term, given Magic's context.
That being said, yes, Kyoto, I think you might be missing something. The big complaint I remember while I was still playing was that Riku was very mana hungry. You may want to adjust your design to accommodate that.