I usually work up to a heavy triple or five on deads. Try to up the weight every week. squatting depends on what i am doing, a heavy set of raw squats would be 5. I like singles in my suit, form breaks down too much. Same in my deadlift suit, i have found anything other than singles in my deadlift suit is a waste. Benching i do high rep stuff on raw days, but i will be doing more heavy singles from now on, nothing at failure but heavy none the less. i keep my reps in the 8-15 rep range on the majority of my accesory work. I am a competitive powerlifter, so this will vary towards your goals.