I’m not sure how this debate helps Trump. Biden can overperform simply by showing up and stating his own name.
Yes, Biden has lucid moments so if they time it right, he’ll look good. Trump is Trump, disciplined and on topic he’s good. It will be a bit like the DeSantis and Newsom debate—Like DeSantis, Trump has the good data, we were better off under Trump then since under Biden.
The moderators will gang up on Trump. Joe Biden will be able to say his name. So it'll be a "win" for Biden.
Trump shouldn't debate unless somebody like Sean Hannity is the moderator (Biden's handlers will. Ever after to that).