Looks like Verge Rangers is our Weathereder Wayfarerer...There will be a mono-white card that lets you repeatedly ramp Plains from your library onto the battlefield.
Slightly worse Courser of Kruphix, although on the plus side your opponents don't get to see your top card.
Do I play Courser of Kruphix in lots of decks? Yes. So at the end of the day Verge Rangers is "good enough" to play for card advantage.
Still obviously best paired up with the play additional land cards in Green.
Flawless Maneuver looks like an all-star to me. Zero cost protection, I'll find a slot for it in a lot of my white/X decks, that probably don't have blue.