FYI I run Oath of Jace and it's been pretty phenomenal over here; decks tend to like lots of spells, but they'll happily trade that away to scry with their Tamiyo, the Moon Sage to keep Miss Moon Ladyma'am alive by improving their draws.
I'm not saying "Run Oaths to power up your 8-Planeswalker SuperFriends decks!" I'm saying they offer great perks for just grabbing up 1 or 2 'walkers.
I may be a little late to this discussion, but on the subject of Oaths I wanted to say that oath of nissa has been wonderful in my cube.