If someone offered me $1,000,000 to guess exactly what would happen, I'd say the following:
We currently have 15 commits per Rivals.
I think we lose 3 of them between now and the end of the recruiting season to either King Kiffin dismissing their likelihood of contribution or them finding interest elsewhere.
That takes us to a Net 12 for right now.
Given the quality that Kiffin is going after currently, I'd say his new staff pulls in 8 more recruits for a total of 20 at the end. With the average star quality of those 8 players being over 4 stars.
If he lowers that quality, perhaps we hit 25. I think 30 is very unlikely unless he has some staff up his sleeve that make us even more desirable for recruits.