@thelocust619: You're the one who can't spell and dismisses arguments out hands just 'cause without providing any serious calculations or actual quantatization or analysis of feats other than "Legendary Godzilla is bad". So if anyone is bringing failure into this debate, it would be you.
GxMG Goji's best feat is slowing down a pseudo-black hole, which cannot be an actual black hole because for one thing; it didn't swallow the entire planet like a real black hole would nor would an actual black hole do anything but grow when met with a feed of energy. Yes Godzilla defies physics, but if it doesn't quack like a duck, walk like a duck, or look like a duck, it's probably not a duck. Otherwise, GxMG Goji didn't do anything terribly out of line with what Godzilla does normally besides one instance of blur motion and leaping really high.
He shows no especially super-impressive strength feats by Godzilla standards and his beam, judging by it's effects on buildings, is not super-powerful either. Megaguirus is really just that much of a wuss. She was a glass cannon. The moment she started taking hits, her entire gameplan started falling apart and she was hurting badly within a handful of minutes.
Kiryu Godzilla's beams are not particularly powerful; certainly nothing in comparison to Hesei or Final Wars Godzilla. They are flashy with the pre-beam flare up, but judging by the damage they do to known variables (tanks and buildings) they don't display anything to suggest that they are more powerful than what Legendary Goji outputted. In addition, Kiryu Godzilla is a dumbass who's prone to just standing around and taking hits repeatedly. And was ultimately bested by having silk spewed on him and getting drilled before being dropped off at sea to presumably die.
GxMG Godzilla, while potent given his Spirit bomb tanking feat (still less impressive than walking off Castle Bravo to the face); again only showed particularly amazing beam feats when he was specifically powered up by King Ghidorah's lightning. In addition, all of GxMG's opponents were quite weak. Baragon got kicked around like a dog, Mothra at best annoyed GxMG and felt every serious hit she was dealt, and King Ghidorah got the crap beaten out of him until he was charged up by Mothra transferring her spirit energy into him. And even then, none of them actually did him any lasting harm until a drill missile opened a hole in his shoulder and he blew himself up. Which says more about his internal durability than his beam.
Final Wars Gigan's cluster-beam is very unimpressive. Final Wars Godzilla didn't even flinch from it, and it's explosion radii and effects place it on par with a spread out artillery barrage. That Final Wars Mothra was lit up like a roman candle by this speaks very badly for her durability with regards to energy attacks. Final Wars Godzilla is granted; still perhaps the most powerful Godzilla (though debatably Marvel or IDW Godzilla is his superior) and Gigan put up a good fight (only when helped by Monster X though and upgraded , pre-upgrade Gigan got punked like a bitch), but Final wars Mothra is by comparison not really impressive.