I don't know about best, but this one has served me well: http://www.urban-rivals.com/presets/?id_preset=1449983.
I think the best way to win with Freaks is with 8 power guys, and there best 8 power guys are Bogdan, Baldovino, Olga, and Grudj.
The problem is that is a 16 star 1/2 deck.
The other 1/2 of the deck needs to probably be 2, 2, 2, 3.
So if you go mono-Freaks, Hula, Soushee, Esmeralda, and Akendram would be my choices.
If you go with a 1/2 deck, I would look at La Junta or Sakrohm (Dean, Winston, Wardog, Jane Ramba, Murray, Na Boh, Wakai, Nimestiec). I would probably lean towards Sakrohm because the pill forcing nature of their ability and the life gain work well with the Freaks.
Hope that helped.