In fact, Id argue that the only reason poison is even a viable strategy in Commander is because of the existence of proliferate as a mechanic
Eldrazi Incursion Commanders and New Cards The default commander for Eldrazi Incursion is Ulalek, Fused Atrocity, a technically colorless commander that, thanks to the wonders of hybrid mana costs, lets you play with all five colors of Magic
Qarsi Revenant is a very solid vampire creature that can be thrown into any vampire tribal deck, at least in EDH, and even in the graveyard, it helps you to turn another creature into a monster
With this kind of deck, it's important to keep a card advantage so you can continuously increase your board state and put as much pressure on your opponent as possible
Some last notes So, some last notes
Swap Seven-Cost Pluto for Nani Protective Sister As previously mentioned, I would replace the Floodborn Pluto with Nani