We all have a good foundation in the basic blows and combinations.
Think about adding the following drills to your basic syllabus.
These can be trained as "stand alone" combinations OR worked into existing "Defendu" combinations either "before" or "after".
1. HARD left lead to chin (mental foramen) HARD overhand right to chin (opposite side) then: HARD upward right knee to fork.
Repeat punching combo. Then: Side step with right leg (out and to the right 45 degree) LEFT knee to fork.
2. HARD left to chin. HARD right to solar-plexus.
Then the knee smashes as above.
3. HARD left to SOLAR-PLEXUS. HARD right to chin.
Then the knee smashes as above.