Add concepts needed to your fundamental routine.
1. Create a rhythm sheet made up of rhythms from you selections. Use that as your articulation exercises or play Remington on a particular rhythm. How many reps of rhythm practice would that be for one exercise with feedback (in 4 counts) between every rep (might be able to play a correct dotted eighth sixteenth rhythm in a short amount of time). Then reference that fundamental in the music.
2. Use your lyrical section as your chorale every other day.
3. If your music has major, minor, diminished chords or specific intervals in it. Do your Remington, articulation, or other fundamental exercise using that chord or interval. This is an ear training exercise that conditions the performer's ear to recognize those sounds. Also can help with choral tuning.
Make any skill needed into a fundamental. This can be done with score study. It doesn't matter the level of the section. This can all be done with grade 1-5+.
Less talk more reps is always a good plan.