Can we all agree about the obvious fact that Shiki can kill servants?
I mean, it's obvious.
Saitama can kill anyone because he is too strong for you.
Not him but is Touma still afraid of facing three average thugs? I remember him running away from those at the beginning and he later said he couldn't take 3 on 1. Later on he was hidding away from soldiers. Did he gain a powerup that enables him to fight non-magical shit.
He can manage fighting thugs one on one, he defeated hamazura at early story. Now he almost defeated him eventhough the other one had a power lifter/exoskeleton guided by an AI while he fell from a few meters on the back.
Tomua took out a group of guys with assault weapons.
He's a competent street fighter but he easily loses his shit to people that don't use Magic and ESP as a crutch.