I agree that Sultai seems the colour combination most likely to challenge the idea that the best standard control list will have Teferi in it, but the lists posted so far don't appear optimal.
Notion Rain vs Chemister's Insight - for the purposes of the control playstyle you always get a huge benefit from being able to play on your opponents turn if possible, which plays into Chemister's favor. In addition, as a control list we're likely to have games where we end up stabilizing the board state on a lower life total, which makes the 2 damage from Notion Rain difficult at times.
Thought Erasure. This card seems a little dubious to me. This is not like Thoughtsieze in older formats where you're happy to run it out on turn one because you didnt have any other play. Turn two is where our counter magic starts to kick in. If we have Essence Scatter or Syncopate we probably want to hold up that two mana for our opponents turn. So this card ends up becoming more of a mid game play where we can run it out on turn five while keeping up mana for Sinister Sabotage. That changes the value proposition for it and its place in your deck. It may still be a valuable include even as a mid game play, but I suspect 2 or 3 copies is enough.
Notion Rain vs Chemister's Insight - for the purposes of the control playstyle you always get a huge benefit from being able to play on your opponents turn if possible, which plays into Chemister's favor. In addition, as a control list we're likely to have games where we end up stabilizing the board state on a lower life total, which makes the 2 damage from Notion Rain difficult at times.
Thought Erasure. This card seems a little dubious to me. This is not like Thoughtsieze in older formats where you're happy to run it out on turn one because you didnt have any other play. Turn two is where our counter magic starts to kick in. If we have Essence Scatter or Syncopate we probably want to hold up that two mana for our opponents turn. So this card ends up becoming more of a mid game play where we can run it out on turn five while keeping up mana for Sinister Sabotage. That changes the value proposition for it and its place in your deck. It may still be a valuable include even as a mid game play, but I suspect 2 or 3 copies is enough.