I take Barrett. And don't bother with AD. C's could become the next Warriors in 2 years.
Irving, Brown, Barrett, Tatum, Horford
Smart, Hayward, Baynes
Plus Clippers and C's pick.
Then Grizz first in 2020.
One thing I am not sure about is if you were able to deal Hayward and Clippers 1st for cap relief. If Horford is up with that cap relief maybe you have enough $ to sign AD. Again not 100% sure but man Irving, Brown, Barrett, Tatum, Davis and Smart as your core is nuts.