3x3 reps. Goal is to go heavier weights than last 2 weeks. For example if last week you did 5reps @90+95+100kg today would be good try to go 97,5 + 102,5 kg + 107,5 kg.
Dont try to make out 3 rm on this. 3 heavy sets is the purpose, we dont want to make your lower back too sore. We want to make you stronger step by step.