>>1873327
>Seer's Snare is the best mode
Correct.
>I don't even know what that Auto Affinity mode is about
You pick four units, you get to pick a party of four units from another player, and the game has them Auto Battle across a map until you win.
That's it. It was so bad, they made United Warfront in a rush to try and replace it. Usually we only get one mode per year, but they quickly spat out a second.
Made for some funny images, though.