Color identity is less important for these, as the commanders' abilities make up for this lack of versatility that partner commanders provide
Pro Tour Theros was full of successful devotion decks, with mono-black, mono-red, Gruul, and mono-blue all represented in the top 8, and the finals being decided by a blue mirror
Top rate filler card that has an OK chance of setting you up to cheat in a fatty
While this depth appeals to me, it can also make it a little more difficult for new players to feel like they can really be competitive
This could suggest that either red/blue are deeper than green/white, or that red and blue are capable of fielding independent archetypes without the help of any other color
I found this notion of prior serenity taken over by the wave of compleation a good point to start