Playing the hypothetical game. Assuming Illinois will have ~20 scholarships to give out in 2019, I've built a respectable recruiting class that can show some projections. I have Illinois getting a couple more top-notch recruits (Sorrells, Bargy, Cooper), but I would say that this project isn't too aggressive as Illinois is already connected to a number of these guys (you could even get more aggressive and suggest Illinois grabs Billingsley, Erick Young, and a few others).
< projected class elided for brevity>
Now, when comparing this class to last year's recruiting rankings, this would have been the 4th ranked class in B1G (Behind OSU and PSU, on par with Michigan), and the 22nd ranked class in the country (between Michigan and Nebraska).