I have been brewing hard with Paradoxical Outcome and I have cut Time Vault based on the Eternal Weekend decks and the results from MTGO. I have not been doing well with the deck in it's current form.
Playing the deck without Time Vault means you must win with Mentor or Tendrils. If you cut the Vault then I usually cut Tinker, which means the bot is out too.
Is this the best way to go? I can see why the bot is a liability. He only wins some of the time when he hits the board. He can be stolen or copied, bounce or plowed.
But Time Vault is much harder to stop. The set up gives you an edge and a hidden out against decks that attack your Paradoxical strategy. It appears to me that players like thepowernine prefer losing the Vault because they prefer a storm kill. IamActuallyLvL1 is playing Time Vault but his list is not breaking through like it did before.
What are the pros and cons of running Time Vault? I know it eats up some slots - at least 4 for 2 key, 1 vault, 1 tinker. Maybe 6 if you add bot or Tezzeret the Seeker. But these are all good cards, they just push you to play a different game over a consistent storm kill.