Ajani, Outland Chaperone does less buffing, but generates lots of little creatures and has some of white's conditional removal
Of course, you should build up a ton of cards that take advantage of your opponents drawing tons of cards and make Xyris's combat effect particularly strong
Poison is an alternate win condition
Now, thanks to Doomsday Excruciator, these players will get a taste of their own medicine, having their decks cut down to a sliver not by choice, but by force
What should have been higher or lower
Feline Ferocity - Arahbo, Roar of the World Vampiric Bloodlust - Edgar Markov Arcane Wizardry - Inalla, Archmage Ritualist Draconic Domination - The Ur-Dragon Opened but never played, literally only the shrink wrap is missing from each deck, everything is included and in like-new condition