The revision that most effectively uses referents to create coherence is:
Hanyu was the clear winner of the snowboard halfpipe championship. He performed more tricks than his competitors, and with a higher degree of difficulty. Hanyu also got more height off the snow than anyone else.
This version maintains clarity by consistently referring to Hanyu, uses varied sentence structure for flow, and logically connects his achievements to explain why he won, thereby enhancing coherence.