Let's try this.
NJ 02,11 PA 05,06, 07, 17
AZ 02, CA 49, CO 06, IA 01, KS 03, MI 11, NJ 11, VA 10 Those are certain already. So that's 14 pickups but Rs have a pickup in PA 14 so that's 13.
Out of 4 competitive in MN i'm going 2-2 split which doesn't affect net pickups cause 2 are D held.
Out of 5 in CA (10,25,39,45,48) I'm going with 3-2 split which is 16.
Out of 3 in IL (06,12,14) I'm going with 1 so it's 17.
Out of 2 in FL (26,27) I'm going with 1 so it's 18.
Additionaly I give dems out of tossups MI 08, one of NJ03 or NJ 07, one of NY 19 or 22, PA 01.
So that's 24