Dry outranges so extremly badly its not even funny, its dozens of kilometers vs someone who can nuke something the size of europe, so Diamondhead can play the range game all he wants, hes still getting hit by Dry.
Crystal sealing is a pretty good move, but Dry has precog and powernull, so he would just snipe Diamondhead with his wave infused fire attacks. Not only that, Dry has experience in space combat, just flying around isnt going to faze him, considering that 90% of his enemies can fly freely.
While those skill feats are nice, they still pale in comparason to Knight Runs skill fuckery. Dry is the current Top Sword, the greatest living Knight in the universe, which puts him above Master Knights, who are above Knights, who are above Knight Trainees. Knight Trainees are made up of the greatest warrior and prodigees across the universe from numerous planets. Knight Trainees have to their exams to become Knights. One such exam was shown, from multiple starships full of Knight Trainees, only 3 survived. One who survived was Pray Mayer, a Knight Trainee who rose from bottom up to Top Sword in 6 months, the fastest record in human history. Pray created the Pray Style, a martial art based on the deadly Mayer Style, who in turn is made up from various ancient martials across human history. Pray trashed 13 Mayer Style masters and the legendary Karen Mayer at the same time, whil having to use specific techniques in a specific sequenz, in order to finish her Mayer Style exam and become a master herself. Anne Mayer, the physically weakest Knight, can trash a group of Knights armed with weapons and intel on her, who are all stronger and faster than her, barehanded and all at the same time, based on nothing but pure skill. She later wiped 5 Master Knights barehanded, even someone who blitzed her to hell and back. Pray is hillarously above Anne (Im talking about a 3% win rate for Anne in 1 on 1 duels). Pray aknowledges Dry and believes that he can actually win against her. Cold Heroes are Knights who are so powerful and skilled that they are frozen so that they can save humanity if all things goes to hell, they are literal war assets akin to nuclear weapons. All of them bow before Dry and aknowledge him as superior.