Changed the list a bit - focusing on 3 beasts works better, and Zixor is fun but a bit slow overall. I found I win more games just throwing beefy mules or wolpertingers on the board turn after turn and then finish with rhinos when you get the chance.
It's fun - but it can be tough if you don't get the Leatherworking Kit early in the game.
EDIT: Decided to give The Rat King a try since I just opened him in a pack. It's way more fun than rhinos... maybe not as "good", but gosh darn it... fun is why we play a game. As long as your opponent is playing for board, you will almost always come out on top due to infinite rat king value.
Anyway, just have fun with the game, okay?