Kent's main objective for facing Grand Elder Ruolan wasn't to see if he could confront a sovereign.
No, he had already reached a level that gave him the confidence to face even multiple Peak Sovereigns and walk away smiling.
This confidence came from what happened the day before the battle.
When he left for the Pill Master Competition, his ladies gathered and held a meeting. In this meeting, they each shared their views on how best to support their man.
Naturally, it boiled down to sex.
However, Alina raised a point that made them all aware of something.
They realized that while sex allowed their man to grow, he didn't depend solely on that. The points he gained whenever they leveled up or broke through were equally valuable.
They concluded that, aside from relying on sex to level up, they would actively cultivate too.
Whenever he is not around or there is no stronger woman around to increase Kent's cultivation base, they will get down to good old traditional cultivation.