If they take Toilolo it better be as the 3rd DT in the class. That's an acceptable take, IMO. It's not if he's one of the two they take... Unless you're referring to Marcus Fakatou? He's an obvious take and if ND can somehow land Folorunsho, Fakatou and Parks in the same class that would be DL haul I can ever remember them having. Ultimately, I think they get two of the three.
Sabb and Henderson are among my realistic reaches and I would agree that ND's chances with them are much lower than they are with some other players on the list.
If you miss on Henderson, however, you better hit on one of... Joakim Gouda, Toa Satele, Roman Igwebuike or Brayton Feister as a backup option. Guys like Noah Glover and Mekahi Allen are not sufficient replacements to be #1 LBs in a class of this quality, IMO. Especially in a two man class.
Similarly with Sabb, if you miss the replacement has to be adequate. I'm talking Easton Royal, Osani Gayles, Julian Caldwell, or at worst, Khalil Taylor. The likes of Quenten Burrell or Tyler Fryman aren't going to cut it in what projects to be a three man class.