I'm interested to know a bit more about your training, since it's obviously working very well for you.
You say you follow Prilepin's table and you are flexible with the weights, does that mean that you also adjust daily volume/total reps based on how things are going?
And you also say 98% of your training is the comp. lifts, you don't really do any variations? What about accessory work like lats and abs?
I have been experimenting with different things, I find that variations don't do much in terms of building strength for my squat and deadlift, although they can help with technique in some cases (like SSB squats to fix forward lean). Bench seems to respond to anything, but maybe because it's my best lift and probably the least technical of the three.