To begin with, I feel many (most?) people do too much volume as it is. I'm an advocate for the less is more approach to building our bodies. High intensity, more frequency (in working each muscle group), and less volume.
Many people get good results from working each muscle only one time per week with a lot of volume when they could be getting greater results if they at least cut the volume. More is not better! More volume, especially with a good level of intensity, requires a lot of time to recover, yet most bro's are already working the same muscles before they had enough time to properly repair / grow.
So to cut to the chase as it applies to Kgkle, high intensity, low volume workouts are fast. You'd be getting straight to the point. No doing shit loads of sets, ultimately tiring yourself out before you get to the sets / reps that matters the most. Warm up and BOOM, you're already giving it all you've got for that 1 set or 2. That's all it really takes to build strength and size if all the other factors are in place.
Super sets, rest pause, slow negatives, and drop sets are great intensifiers. I'd focus on rest pause (select your weight, bang out as many reps as you can, rack the weight, wait 30-40 seconds, bang out as many reps as you can, rack the weight, wait 30-40 seconds, bang out as many reps as you can, done).
I'm a big fan of Mike Mentzer's training principles along side with Dorian Yates and Dante's Doggcrapp training routine. I can't recommend enough customizing a quick routine based on the above. Shit works! It takes a different mind set because we've been told for decades that we need to perform a lot of sets for each muscle group. We don't! You can break down your muscle fast with only 1-2 sets per muscle group, per workout, which allows you to recover faster and start growing faster. 2 workouts = whole body. Hit the gym 3x per week and you'll be working each muscle group 3x per 14 days. It's fast, you get straight to the point, you recover faster, grow faster, and are able to train that muscle sooner which means you'll trigger growth more times per year and actually grow more than you would've with more traditional workouts.