Nobody can put a number on this thing, which is why nobody is replying. Recruiting, as has been said once or twice 'round these parts, is fluid.
That said: I think it's extremely unlikely we get both of Diallo & Harvey, who are roughly the same player and play basically the same spot. It also has to be factored in that we've never beaten UK for a recruit while they've had Calipari, but in this scenario we'd be beating him for two (Diallo & Richards). And Duke, meanwhile, have offered both Diallo & Harvey.
We're also going toe-to-toe with programs like UCLA, Kansas, Arizona, Louisville, Indiana, Syracuse and Maryland for all these guys -- and those are all teams that win as much as/more than they lose on the recruiting trail against us.
Getting one out of the four above is fine. Getting two is great. Getting three out of the four means Ollie's put together his best recruiting class, and arguably one of the best in school history.
Getting all four? Honestly, that would be kind of unheard of for UConn. If you put money on it make sure you get really, really good odds.