absolute faillure means that you need at least 2 or more spotters until you canīt controll the negative part of the last rep......
i train in each exercise only the last, (sometimes the last 2 sets) to/or close to positive Faillure.....
So, my Training session is about 10 Sets warm-up + 6-8 "hard sets" whith which i hope to stimulate the Body to build more muscle or to get stronger (depends in which rep-range i will be training)