The Cavs do not worry me much. Mitchell is a star that doesn't make others better. Garland is not a great second option, if he can even stay healthy. Love Mobley, but they really lack the toughness you need in the playoffs. They will struggle just like they did last year in the playoffs, IMO.
I'm not trading away 5 firsts, but I am looking to make a serious move. Harris, Holland, 27 and 29 1st round pick with a pick swap in 28 for Trey Murphy and Jose Alvarado.
I have made my Murphy case enough. Alvarado is a good backup PG option. Small, but you can accept that more for a backup. Average shooter from 3PT which is fine, decent ball handler, plays above average defense. He fits the culture. He goes 100% at all times, really throws his body around for a little guy.
If that fails, I go after MPJ.
After that, I don't know. Maybe some smaller moves to consolidate the roster a bit. You won't go 10-11 deep in the playoffs, so trade some of that back end depth to try and improve the 7,8,9 spot if possible. More two-way players, fewer specialists.