Hello. Just to let you know this is against the rules for a number of reasons. Firstly battles only belong in the battle forum section. This is the general discussion section. Secondly repeat battles are not allowed aside from specific exceptions. This has been done more than once before. Thirdly both images of the characters (with no water marks) and conditions for the topic such as location are also needed. Anyway hope you like the vice. This will probably get locked but just try and keep this in mind if you want to start another topic.
Yeah Saitama could beat pre skip Zoro. He has hype to maybe beat current Zebra. Shioto is iffy and in the grey area. It's an instant kill but there must be a limit. It worked on someone stronger than Zebra (White Nitro at the time was stronger) but obviously he didn't or couldn't use on Red Nitro or the Four Beast.