Containment Priest and Yixlid Jailer are fine. They are the reason I was playing 4 Barbarian Rings main deck in Dredge the past couple of months (including in the TVSL), because I was not interested in losing to the random decks that were playing a couple of main deck Priests. I think they are more valuable than Cabal Pit though if you are planning to cast cards like Ingot Chewer and/or Ancient Grudge, as they are essentially "on color" for your other anti-hate measures, which I found to be extremely relevant.
Like most anti-Dredge cards though, they are not standalone answers. They just buy you time, much like Null Rod or Stony Silence do against artifact decks, before the enemy finds an answer. Your hate cards work best when you can protect them and simply buy time to do something else powerful to quickly wrap up the game.