Just did some number crunching.
Using 247Sports rankings, I averaged the composite score for the top 25 for each year since 2011 (first year of 247Composite). I also averaged the same over the last 5 years.
Likely: If the class picks up Meadows, Shanklin, Zackery, and Golden, that will equal 276.24. This would be good for 8th overall, and 8th overall if you average just the last 5 years.
Possible: If the class picks up Lange, Ikinnagbon, Nix, Blair, and Penson, that will score 287.56. This would be good for 5th overall, and 6th overall if you average just the last 5 years.
Dream: If the class picks up NOB, Mikhail, and Talyn Taylor, that will score 296.24. This would be good for 3rd overall, and 4th overall if you average just the last 5 years.
So it seems like top 8 seems reasonable. We'll see how it works out.