You can pair all the free tokens with the Vampire Lords, such as Captivating Vampire, to buff them up and make them a real threat
The Frog Token could be beneficial in a deck that focuses on token generation, creature sacrifice, or synergy with tribal themes such as Merfolk or Elves
Bolas's Citadel synergizes with the small lifegain subtheme in this deck as you can pay life to play spells off the top of your library for more card advantage

Abhorrent Overlord Abyssal Harvester Acorn Harvest Aerith Rescue Mission Ajani, Adversary of Tyrants Ajani, Caller of the Pride Allied Reinforcements Angel of Invention Anim Pakal, Thousandth Moon Antiquities on the Loose Aplan Mortarium Arachnogenesis Army of the Damned Artifact Mutation Ashiok, Wicked Manipulator Assemble the Entmoot Assure // Assemble Assure // Assemble Aura Mutation Auton Soldier Banshee of the Dread Choir Basri Ket Battle Screech Baylen, the Haymaker Beck // Call Beck // Call Beetleback Chief Belfry Spirit Benevolent Offering Benthicore Birthing Hulk Blade of Selves Blaze Commando Blight Herder Boggart Mischief Borough Backup Bramble Elemental Bristlebud Farmer Brood Birthing Brood Monitor Broodbirth Viper Broodhatch Nantuko Broodspinner Call the Scions Caller of the Pack Captain of the Watch Captain's Call Carrion Carrion Call Case of the Pilfered Proof Cenn's Enlistment Chancellor of the Forge Chandra, Acolyte of Flame Chandra, Flamecaller Chasm Skulker Chronozoa Cloakwood Hermit Cloakwood Swarmkeeper Cloudgoat Ranger Cobra Trap Conqueror's Pledge Corpsehatch Cosmogrand Zenith Crush of Wurms Cubwarden Cultivator of Blades Cyclopean Tomb Dance with Devils Daretti, Ingenious Iconoclast Darien, King of Kjeldor Day of the Dragons Death Mutation

(6/15/2010) If you target an Aura that's attached to a creature, you may also target the creature it's attached to
At the beginning of your upkeep, you may put a Doctor creature card from your hand onto the battlefield