http://imgur.com/RcF5UPpSimic has always been my favourite deck archetype, here's the list I used to reach rank 40, thought I'd share:
4 x
Perilious Myr2 x
Harbringer of the Tides4 x
Gatecreeper Vine3 x
Elvish Visionary2 x
Evolutionary Leap2 x
Telling Time2 x
Displacement Wave1 x
Nissa, Vastwood Seer1 x
Reclamation Sage3 x
Bounding Krasis3 x
Arteficer Epiphany2 x
Nissa's Pilgrimage1 x
Inspiration1 x
Outland Colossus1 x
Zendikar's Roil1 x
Woodland Bellower2 x
Alhammarret, High Arbiter2 x
Gaea's Revenge6 x
Island7 x
Forest2 x
Hinterland Harbor2 x
Rogue's Passage2 x
Simic Guildgate (you can replace those with 1 island and 1 forest, they're not necessary at all and they slow you down...)4 x
Evolving WildsAs you can imagine, the deck revolves around controlling the board early on, using your small creatures to gain turns, while building the mana for the big fat finishers (aka alhammarret and Gaea's revenge and woodland colossus)
Play smart with your krasis and harbringer and they can mess your opponent up pretty badly and slow him down a lot while building you the time to reach 5/7 mana
Be careful when you fetch your lands using Gatecreeper Vine or Evolving Wilds, you should get islands 95% of the times, since you are going to get your forests using Nissa's pilgrimages. What I'm trying to say is that you should always have at least 3 forests in the deck, so save them and get islands. Mana is not a problem with this deck.
Often you will reach 7 mana and the board will be full of yours and your opponent's creatures, this is why you have displacemente wave x2.
You will have the mana advantage and you can re-drop your creatures to tap or "boomerang" your opponent ones, gain card advantage or even more mana... or you can simply make a good use of rogue's passage (please note that it doesn't work on Gaea's revenge) and finish off your opponent.
You have a ton of options for Evolutionary leap too: sacrifice myrs, visionaries, gatecreepers and find your finishers.
If you can reach 7 mana you will be in a quite good spot and almost always win the game.
If you have questions please feel free to ask
Also, I'm sorry for not adding links to the card list, I'm a bit in a hurry now but if you can tell me how to do it I will do it asap.