The P5!

In Legacy, every color has a very strong 2 drop
White - Stoneforge Mystic
Green - Tarmogoyf
Red - Young Pyromancer
Black - Dark Confidant
Blue - Snapcaster Mage

Last night, I protoyped an Esper colored deck with some of them.

4 Brainstorm
4 AEther Vial
4 Deathrite Shaman
3 Stoneforge Mystic
2 Dark Confidant
3 Snapcaster Mage
2 Swords to Plowshares
2 Spell Pierce
3 Force of Will
2 Standstill
3 Baleful Strix
2 Jace, the Mind Sculptor
1 Batterskull
1 Umezawa's Jitte

3 Cabal Therapy
3 Spellstutter Sprite
1 Bitterblossom (Lent out cliques so it might be better)

It was decent as every of my 2 drop commanded respect.
It's still a very young build so I expect to change much of it.