One unique thing about DGSD Elites is that all 4 learned Shaolin techniques.
BUT, who is the best with Shaolin techniques? Let's see:
Xiao Feng - learned from Reverend Xuanku from age 7 to 16. Presumably continued to practice thereafter.
Xiao Yuanshan - learned from Shaolin since 30 years ago (confirmed in the novel).
Murong Bo - learned from Shaolin since 1 - 2 years ago? Not too sure.
Jiumozhi - learned after Murong Bo gave him.
So out of all 4 Elites, Jiumozhi actually had the LEAST time to practice it, maybe a few years at the most. And yet, we see that he mastered the 72 arts to an INSANEly high level.
Given how much longer XIao Yuanshan had to practice several of the 72 arts (30 years), and how good he was already before laying hands on them, it would be a shame if he's not more proficient at Shaolin supreme arts than Jiumozhi. Not to mention, Xiao Yuanshan concentrated on just a few arts, whereas Jiumozhi didn't have time to focus on any of them, since he tried to learn all of them.