Chain sickle training had to wait.
Atlas' starting point was a broken body that was only fully fixed on the 10th Floor. In the past few years, he'd managed to develop it through body cultivation, but his development was mostly uniform and without purpose.
They were strong in the sense of defense, but for the most part, his form was purely for appearance's sake.
That needed to change before anything else. The reason why Atlas was taking a beating every day was because Alaric was using his own methods and qi to develop Atlas' body to what it needed to be.
Rather than brute strength, the core of Atlas' past strength, he needed to continue to focus on what he was doing in this life. Speed and dexterity were going to be his greatest weapons. As such, he naturally needed to develop to maximize his abilities in those aspects.