Kang's direct combat ability was fairly average. He was not an especially powerful warrior; most of his abilities came from his technology, as well as certain treasures he had collected across countless Timelines.
Calling them treasures was not quite accurate. They were more like souvenirs, collected from the people he had defeated.
There were useful items among them, such as Silver Surfer's board, Gamora's Godslayer Sword, Captain America's shield, and Magneto's Anti-Mind Control Helmet.
But there were also plenty of useless things.
For example, Vision's corpse, Nick Fury's head, Peter Parker's heart, and other things that were utterly useless in battle.
Those had all been collections from his early years. Later, he grew numb to it. If he wanted, he could obtain as many Nick Fury heads as he liked by repeatedly splitting time. The joy of collecting gradually faded away. After all, even Fury's heads, once piled into a mountain, were still just a pile of human heads. They had depreciated.
He found collecting other objects meaningless, so he turned to collecting these "realities" themselves. In other words, he began playing with things like "creating Single Universes."
How should one put it? He was like a more deranged version of the Collector, Taneleer Tivan. Both were freaks with infinite lives who had turned their hobbies into Squirrel Syndrome.
Su Ming had always been careful not to go insane. Infinite life could indeed distort one's mind over time. Fortunately, although he killed people too, he had not yet developed the hobby of displaying enemy corpses at home for amusement.
Perhaps because things had gone too smoothly for him across too many Timelines, Supreme Kang had never developed the habit of carrying powerful artifacts when he went out. If he suddenly pulled out an Ultimate Nullifier now, Deathstroke might have had