Antvasima said:
Well, maybe I misunderstand. If Boros is scaled from an energy blast, his durability can be lower.
I feel that Boros' strength and durability would scale to Saitama's Moon Jump. During the entire fight, Saitama is gradually putting a little more effort to face Boros. First he does one standard punch against Armored Boros. Then he only blocks Unsealed Boros and a normal attack tears his arm off. Then he fights Meteoric Burst and gets pushed to the moon. Only then does Saitama start trying to fight Boros back. His narration even says it "Now this looks more like a real fight ".
Saitama's Moon Jump and the Respective Punch and Combo he fired at Boros logically have more effort put into them than anything Saitama's ever done before in the manga, even his punch against the meteor (Which is Island level). Also notable that this is the first time in the series where Murata draws a serious, more detailed Saitama during a fight. This indicates that Saitama's actually trying harder here than ever before, and allows us to scale Saitama's punches to anything he ever did before.
Boros absolutely would have a durability that would be Continental at a minimum, and this is only using the manga. If you people want to have Planetary Boros, then he'd have to be way stronger too to endure the energies within him.
If you go strictly by the manga, then we have three things: Saitama's Moon Jump. Boros's Attack and Saitama's Serious Punch.
Here are calcs for all three:
http://www.narutoforums.com/xfa-blog-entry/opm-feat-saitamas-moon-shockwave-revised.33495/
23.809 petatons
http://www.narutoforums.com/xfa-blog-entry/opm-feat-planet-buster-roar-cannon.33496/
511.71 petatons
https://forums.hero-academia.com/xfa-blog-entry/saitamas-cloud-parting-revised-opm.31015/
1.667 exatons
This means that Saitama's Serious Punch is about 3.25770456 times stronger than Boros's Planet Busting Roar Cannon, which is itself 21.4922928 times stronger than Saitama's barely trying strength.
It is
scary how close and consistent these numbers are.
The energy produced by Saitama's leap should scale to his punches against Boros, seeing as both instances have a "Barely Trying" Saitama putting more effort than ever before. And unless someone can prove me mathematically that Saitama's KE, which produced the moon feat, got so astronomically reduced within seconds, it would also scale to Boros' AP as he was devastating his own ship while Saitama's only made a small crater.
Boros' AP should be comparable to his durability, regardless, since Boros was the first opponent who could actually physically affect Saitama with his attacks. Sure Boros didn't hurt him, but Saitama was at least feeling and being scratched by his attacks, as stated by the narrator during the beginning of the chapter.
Basically, Boros during the Meteoric Burst should at least be Continent level in both AP and Durability.