But against Tinker + Collosus, all you need to do is name Tinker via Meddling Mage, keep a Swords to Plowshares in hand, or just make sure they don't have any moxen in play. Or you could simply counter it. I don't think Collosus warrents the slots Extract uses in the deck.
I've tried Orim's Chant, and it doesn't seem to work very well because its extremely conditional.
Stax is a pretty bad matchup against Birdshit...if they get a good opening hand. But Birdshit has answers to threats Stax has, so if you can just deny their key components, I think Stax will be one of the easiest matchups you can have (Since they don't have countermagix anyway).
Has anyone considered playing Kataki main instead of Null Rod? It doesn't nullify the mana production of moxen the turn after they come into play, since moxen produce 1 mana, and they need to pay 1 mana for upkeep. And its a beat stick too.
Pros and Cons over Null Rod & Kataki:
1) Null Rod stops ALL artifacts. Kataki only makes them pay upkeeps. However, moxen are the primary concern as people seldom use non-moxen-artifact with activated abilities now. Thus, their use is to primary stop moxen. Kataki lets them use the moxen for 1 turn (the turn they play it) before the upkeep costs hit next turn. Null Rod stops them outright.
2) Kataki is a 21 Beatstick. Null Rod isn't. Null Rod is a dead card agaisnt some decks. Kataki is never a head card being a 2/1 creature.
3) Kataki is cool.
Null Rod does nothing... And is more expensive.

Instead of 3 Null Rods main, would 2 Kataki and 1 Null Rod be better instead?