Lotho, Corrupt Shirriff Lotho, Corrupt Shirriff can create Treasure for you during each players turn, which can give you a quick leg up in the game

Grey Knight Paragon Hour of Reckoning Inquisitor Eisenhorn Inquisitor Greyfax Inquisitorial Rosette Knight Paladin Launch the Fleet Marneus Calgar Martial Coup Memorial to Glory Mind Stone Mortify Neyam Shai Murad Path of Ancestry Port Town Prairie Stream Primaris Chaplain Primaris Eliminator Reaver Titan Reconnaissance Mission Redemptor Dreadnought Sanguinary Priest Scoured Barrens Sicarian Infiltrator Sister Hospitaller Sister of Silence Sister Repentia Skullclamp Skycloud Expanse Sol Ring Space Marine Devastator Space Marine Scout Sunken Hollow Swords to Plowshares Talisman of Dominance Talisman of Hierarchy Talisman of Progress Terramorphic Expanse The Flesh Is Weak The Golden Throne Thunderhawk Gunship Thunderwolf Cavalry Tranquil Cove Triumph of Saint Katherine Ultramarines Honour Guard Utter End Vanguard Suppressor Vexilus Praetor Zephyrim NEXT: Magic: The Gathering Warhammer 40,000 Commander Deck Previews: The Ruinous Powers
We think buying and printing proxies should be easy
Then you follow that up with exiling all cards from all of their graveyards
Oh, and the commander cards play pretty damn well together, too
The last reason is people have close to zero ways to attack the deck: Duress can be annoying, but thats mostly it