UW Aggro

// Lands
4 Glacial Fortress
4 Marsh Flats
1 Misty Rainforest
1 Arid Mesa
8 Plains
2 Island

// Creatures
4 Knight of the White Orchid
4 Vedalken Outlander
4 White Knight
2 Devout Lightcaster
4 Emeria Angel
4 Baneslayer Angel

// Spells
4 Path to Exile
2 Brave the Elements
4 Honor of the Pure
2 Negate
4 Fieldmist Borderpost
2 Elspeth, Knight-Errant

// Sideboard
SB: 4 Celestial Purge
SB: 4 Day of Judgment
SB: 3 Wall of Reverence
SB: 2 Devout Lightcaster
SB: 1 Brave the Elements
SB: 1 Negate

From the Department of "Maybe you can beat Jund by playing with a lot of protection and hate cards" comes UW Aggro. I'm not personally super-assured that blue is really the strongest in the long run, and sadly Blightnings are keeping Ajani from being playable.

This is currently just an "idea", but along with Spreading Seas it may be worth looking into.