2x Quadzilla Complex = 
2x In-Place Lunges with Dumbbells, each leg (4x total)
2x Jumping Lunges with Dumbbells, each leg (4x total)
2x Jumping Lunges unloaded, each leg (4x total)
4x Squat Jumps

3x Quadzilla Complex = 
3x In-Place Lunges with Dumbbells, each leg (6x total)
3x Jumping Lunges with Dumbbells, each leg (6x total)
3x Jumping Lunges unloaded, each leg (6x total)
6x Squat Jumps

4x Quadzilla Complex = 
4x In-Place Lunges with Dumbbells, each leg (8x total)
4x Jumping Lunges with Dumbbells, each leg (8x total)
4x Jumping Lunges unloaded, each leg (8x total)
8x Squat Jumps

5x Quadzilla Complex = 
5x In-Place Lunges with Dumbbells, each leg (10x total)
5x Jumping Lunges with Dumbbells, each leg (10x total)
5x Jumping Lunges unloaded, each leg (10x total)
10x Squat Jumps

In the clip below, Sam completes 5x Quadzilla Complex with 25# dumbbells: