Both good points /edited, also, Sorin for set life 10+unavoidable damage=win and Liliana for tutors. Neither are required really (They do make nice distractions though).
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That is a whoooooole lot of removal right there.
Well, it's sure good at the stalling and defending part. A few counters for non-instants might help a bit, a board wipe like wrath could be disastrous. Some indestructibilities maybe?