I would go back to the Baseline mode until the rehearsal looks good. Then I would go to one of the other modes, but not the Composite mode. Save the Composite until things are looking good on both offense and defense.
I would go to the 3/4 player reaction drills when I see that the players cannot react correctly in Fusion with defense on the floor (using any defensive mode). Sometimes you have to put in massive amounts of reps in order to get the players to do what you want them to do. That’s what I had in mind for the 3/4/5 player drills.
You’ll have to be the judge, but I also think you should communicate this to your players. Tell them why you must go to 3/4/5 player drills. “Fusion is more fun and more game-like, but until you react and move correctly, we have to stay in Drills!”
When Drills look good, we will go to Fusion Baseline.
When Fusion Baseline looks good, we’ll go to Fusion 2-Hand-Hold.
When 2-Hand-Hold looks good, we’ll go to Tucking.
Etc
When Fusion with defense in any mode looks good, we’ll go to LIVE.