Key notes:
1. I think the "fair" game-plan is much more reliable than it would appear at first glance. Despite gunning the combo in game1s, in most match-ups I board down the number of Alurens for games 2 and 3 -- In my experience, the easiest ways to lose postboard are betting on the combo too hard or getting your hand clogged with 4CMC enchantments. Boarding down into a shardless BUG-like 2-for-1 gameplan works very well despite the relative size of our creatures.
2. I don't really like the Thoughtseize plan. We're tempo-negative as it is, and I didn't like going even further negative. Force of Will has played much better for me, and it gives us a strong diversification of interaction that pulls the opponent in many directions (FoW makes them want to hold back, Therapy makes them want to play forward, DRS cuts off graveyard-stocking, Abrupt Decay addresses anything that hits the board)
3. Hinted by the above, I think Abrupt Decay belongs in the maindeck. I started off with zero in the main and then realized I boarded them in for nearly all matches. I'm currently up to 3 and they have been very good for me.
4. I really have liked
Coiling Oracle as the primary cantrip dork. It's much better in verses controlling and combo strategies, and hitting a land with it makes you more explosive where you expect to be playing from behind.
5. I think that it's important to have more red sources than just the taiga, especially if any SB slots are based on it.
6.
Edric, Spymaster of Trest has been testing extremely well in my maindeck flex spot.
7. I have liked Dream Stalker far too much to trim one. This is for a number of reasons. First, I want to be able to combo even if I pitch one to FoW. Second, I've found the 5 toughness to be very important in a wide range of match-ups -- be it blocking goyf, thalia, batterskull, or whatever. Lastly, regardless of whether you expect opponents to be competent in practice, I don't think it's right to shift your deck to beat poor players instead of good players -- it will get you through the early rounds, sure, but it hurts you too much in large tournaments.