@DukeDemonKn1ght's list:
How's 3 Thrasher working for you? I used to say that running less than 4 was crazy, but now I realized that he's very clunky if you have 4. Last time I tested, I was comfortable with 2, but 3 is probably fine as well.
However, I'm going to go with my gut on this, but I really really think you need a total of 3 Jitte in your 75. Two Jitte isn't consistent enough in the deck, especially when you consider that Legend tactic and other people's removal. Perhaps 3 Jitte maindeck aren't needed, but in the games you need Jitte to win, I guess mostly faster aggro decks or Burn, you'll want 3 Jitte.
I have more suggestions, but some are contigent on the fact you run (three) Jitte. I'll see what you think about running 3 Jitte.
If that were my deck, I'd make these changes (for now):
-1 Wake Thrasher
-1 Relic
(-1 Wasteland)
+1 Jitte
+1 Tidal Warrior
(+1 Mutavault)
My suggestion of a 3rd Tidal Warrior sounds retarded, but I can justify it by saying that it works better with Jitte as you can quickly Vial it in after a Turn 1 Vial followed by a Turn 2 Jitte. More importantly, actually, Tidal Warrior makes Reejerey's ability much more dangerous. Doesn't sound like much, but from my experience, Reejerey's ability can steal games where you should've lost.
I was often dead set that Standstill was the best card in the deck, and I often based many card inclusions on their interactions with Standstill. That said, I've always ran Mutavault to the max. My reasoning why I think the 4th Vault is better than the 4th Wasteland because Mutavault can directly win you the game, whereas Wasteland does not, and based on my experience, I always thought 4 Wasteland was too many and undercutting Islands. I parenthesized the land switch because I'm sure you can justify that split. But yeah, I'm curious about your reasoning.
Hope my suggestions help.
As for sideboard suggestions, I don't have anything to add, but I don't think Thorn of Amethyst is a viable sb option. You run way too many instants/etc. to make Thorn one-sided.

