Hi. This deck recently got top2 in a local tournament. The top 2 placers split the prizes due to time constrain.

I've played this deck for more than a year. Used it in all the tournaments and casual games I played. So after tons of testing, I've came up with this:

4 Werebear
4 Meddling Mage
4 Nimble Mongoose

1 Ancestral Recall
1 Time Walk
4 Force of Will
1 Misdirection
3 Stifle
4 Brainstorm
2 Serum Visions
2 Mental Note
2 Seal of Cleansing
3 Null Rod
3 Swords to Plowshares

4 Wastelands
1 Strip Mine
3 Polluted Delta
2 Flooded Strands
4 Tundra
4 Tropical Island
1 Mox Sapphire

Card Choices:

Meddling Mage: Its essential. It acts as a Force of Will on legs since it prevents your most hated spells from being cast. It also slows down alot of decks, requiring them to get rid of the Mage before they can win, buying you enough time to kill them with your Threshold critters.

Time Walk: Its basically used like Relentless Assualt: To get you an extra combat phrase. Since the deck has sucha  high damage output, having another combat phrase is often deadly for your opponent.

Misdirection: Acting as a 5th Force of Will. Its also pretty good when your opponent plays Ancestral and targetted removal spells or bounce.

Stifle: Another must-have in this deck. This card contributes to the mana denial aspect of the strategy. It also protects your lands from being Wasted/Stripped. Its very effective against Stax as well, often turning the tide when Smokestack triggers.

Serum Visions: The most debated slot in the whole deck. I chose this card as it digs 3 cards deep for one mana. It lets you see the next 2 draws, and either lets you plan ahead, or remove those 2 cards if you don't need them. Only disadvantages are that it's a sorcery, and you don't get options when drawing. I've tried alot of canstips. This just seems to be the best choice. Cards like Opt, Careful Study and Sleight of Hand don't dig deep enough. Potent is just an inferior Brainstorm. Predict and Impulse cost 2 mana. I needed an effeciant 1 mana cantrip to fix my mana base and find me answers.

Mental Note: This speeds up and increases the damage output of your creatures, enabling you to reach Threshold in the blink of an eye. Most of the time, resolving just one will get you Threshold. Only disadvantage is that I don't like the idea of not knowing what you'll mill away unless you play Brainstorm/Serum Visions. Drawing too many wasn't good as well, since only 1 is needed to reach Threshold 90%+ of times.

Seal of Cleansing: I keep losing to first turn Oaths. And that AWLAYS happens when I play against them. Thus, Seal of Cleansing provides a mainboard removal for it. It also destroys alot of cards that this deck hates, namely: Crucible, Chalice1,Blood Moon, SmokeStack. This card has saved me countless times.

Swords to Plowshares: I decided to play 3, and not 4 of it because I have other answers to creatures in my Sideboard, and my meta isn't full of Aggro-Decks. Plow is often used here to kill Welders and 11/11s.

Wasteland: This card acts like Stifles, helping to mana screw your opponent. I've also won alot of games just Wasting my own lands to get Threshold. Kinky, but it works.

Mox Sapphire: This card is there to provide added options during turn 1 and 2. Its not for acceleration. I want to be able to maximise my options dueing the first few turns, as its often the most crucial to me. Dealing blows to my opponent's mana base in the early stages of the game are vital. Best opening play for me would be: Strip Mine, Mox Sapphire, Stifle.

Cards that didn't make it:

Orim's Chant: I loved this card. I used it for like 3 tournaments While  it was good, it was pretty situational to be used effectively. I like the additional Time Walks, but felt that it was overkill. It improved matchups that I was already good against. I needed something to help me with my weak matchups.

Sleight of Hand: I used it for 6 months. This only digs 2 cards deep, but unlike Serum Visions, this gives you options for its draw. In my opinion, its either Sleight or Serum.