Infect is not a great matchup for us. With a good draw, Infect can kill in a single swing, although this is not common.
Inkmoth Nexus ignores
Repeal.
Glacial Chasm is pretty good, but they usually run at least a few
Crop Rotation as well as a single
Wasteland. Taxing effects and Sphere effects are good, but not great, as
Noble Hierarch provides early mana, and
Inkmoth Nexus just does not care about most things.
One of the weaker points of the deck is that it runs few creatures that can actually kill you. I like to use
Vesuva to copy
Inkmoth Nexus if I can, because if it untaps I now have a blocker. Otherwise, you might as well
Pithing Needle it as there's not too much else you can name, and naming the (again, singleton)
Wasteland is probably too cute. Chasm is still good, as is
Moment's Peace if you have it.
Ugin, the Spirit Dragon is probably going to be strong here too (haven't tested him yet), but again, he can't stop Nexus.
Basically, you need to cover a couple of fronts at the same time while ending up with a
Primeval Titan on the board somehow. Most of their counterspells are soft counters, although they do run at least a few
Force of Will. Like I said, it's not a great matchup and you need to cover a few fronts at the same time.