Bring up your lagging muscles with giant sets that target agonist muscle groups. As a reminder, giant sets are where you do three exercises in a row for the same muscle using minimal rest between the movements.
But let's add a twist by using the 6-12-25 format. Here's how it looks:
Yep, you're covering all the bases, and you'll trigger a huge amount of metabolic stress. Here are two incredibly effective giant sets for the arms.
Rest 3 minutes and start over. Repeat the whole thing for 2-3 more rounds.
Rest 3 minutes and start over. Repeat 2-3 more times.
Note the band exercise for the third lift. The variable resistance of a band (tension increases through the ROM instead of being constant) is a better fit when we consider the fatigue that's already been set in motion from the first two exercises.
Using a band variation will account for the high level of fatigue and make the final exercise more realistic. Bands are also a great fit for high-volume exercises.
Use this method for no more than four weeks, progressing from 3 sets on each movement on the first week and 4 sets on the second, respectively. After that, you could apply new exercise variations.