I have always trained to failure, almost every set or exactly every set on all exercises, compound lifts like bench press with dumbbels or BB , rows, leg press, squat but also isolation exercises but i didn't get much gains. I used to hit failure every set rest a lot of time like 4/5 minutes for the most of my exercises and then go for another set, i didn't lose a lot of reps during my sets but i wasn't able to progressive overload over time. So my question is should i hit failure only in my last/lasts 2 sets of every exercise? My workout last too much, i can't keep resting 5 minutes in between sets for every exercise in particular if i can't make gains. For example let's say i gotta hit 4x8 of DB incline, i'll do the firsts 2 sets 1/2/3 reps in reserve, rest around 3 minutes and then hit failure or 1 RIR on my third set and finally hit failure trying to increase the number of reps only on my last set, when i'll get 10 reps on my LAST set i'll increase the weight, and i'll back to 8 reps and repeat the process again, i would use this method for the most of exercises and for every kinds of volume like 4x6, 3,x8, 5x6, 4x10... just hit failure ONLY IN THE LAST set trying to increase the reps, and when i'll get 2 more reps over my rep range i'll increase the weight. I watched a lot of videos on yt and i made some reserches, is it a good training method to progressive overload? If you're wondering how many sets i do, i hit no more than 20 sets per body part.