The Strong Ultimate is Immediate and Doesn't Kill Sorin - There are a few modern planeswalkers, such as Gideon, Ally of Zendikar, that could be dropped quickly, and used with it's ultimate as soon as it arrived, but you had to kill it
However, the brake here is that your stolen dorks can only attack their owner, so you might not be able to kill everyone by splitting up your attacks based on their life total
Are Rare Magic Cards Better Than Commons
For me, I would want to combine draw engines to get past creatures and lands with reactive spells as to play my game off the top of my library and on other players turns
Meanwhile, cards like Boros Charm, Heroic Intervention, Ghostway, Avacyn, Angel of Hope, and Teferis Protection can simply take you out of a bad situation outright
My answer was "Yes, absolutely!" I considered many options, but once I landed on Clever Concealment, I knew that was the perfect card for the scene