Well, you know… Ren wasn’t really fighting for real, so it’s not like you can estimate his strength from that.
And the Ren of that time really wasn’t particularly strong.
However, just by relying on the power of the legendary weapon, he was without a doubt stronger than Armor.
“It seems that the reason for Witch abandoning you is documented here.” (Naofumi)
“Really?” (Ren)
“Apparently, ‘the possibility that he will help our cause is low’.” (Naofumi)
“Of course… Naofumi is one thing, but if a group wanted to take over the country, I’d probably refuse… I think.” (Ren)
“No, that’s where you should be certain.” (Naofumi)
“Yeah, the me of that time was a little messed up, so I don’t really have confidence that-” (Ren)
“The old you was supposed to be a (self-proclaimed) cool, analytical character, right? You’d probably have left them without saying anything.” (Naofumi)
“Don’t put it so bluntly… but you’re probably right.” (Ren)