They actively describe the eons as combat experience, they weren't just idling around as that'd defeat the entire purpose the army. The army was well described as the most dangerous thing in Nevada. They can learn to use weapons they wouldn't have ever seen in moments by just grabbing it.
Competing with people comparable and superior to him is literally Hank's thing, fighting Mag Agents, Jesus, and Tricky on the regular. These people are capable of killing countless trained soldiers all capable of one-shotting them with weaponry. He keeps up with those people even despite that.
Nevada's most dangerous army is quite impressive considering the type of subjects involved, but beyond that, experience shouldn't have much impact, even if it's millennia or eons of experience. Weapon handling is also impressive
(it could easily be added as AD but that's another topic).
Raiden is also able to go up against people who can one-shot others solely based on their skill, several people in the verse even have the ability to analytically analyze and predict what they are going to do. For example, the numerous simulations he had involve recreations of Solid Snake and Liquid, who are both skilled at fighting each other, and both have information analysis, mastery of arms and they are geniuses in combat.
Hank does this 1-1 in like every episode he stars in;
Director Phobos, Tricky, and Jesus are all older than him by a good margin with experience. (varying from eons to hundreds of years) so unless I'm unaware of shit that goes on in Metal Gear, Hank has done that same exact thing to a far greater scale.
You wouldn't believe how the eons of combat experience soldiers are trained with.
They're attached with technology that passively puts them through combat experiences that the Nexus Core created, battling waves of trained soldiers who can effortlessly kill them. They have EONS of fighting situations such as that.
Hank's got a billion feats of handling superhuman and more powerful people than him, it's basically his thing. Phobos is special because not only is he that powerful, he has the skill on top of that. He's a generation 01, which means he has enhanced learning capabilities which lets him basically master things within days that would take anyone else months or years to do.
The guy is skilled enough to take on everyone who basically all scale to the stuff hank does, and does it without issue even when battling several of them at the same time.
Raiden's profile is quite outdated, but Raiden is supposedly able to master the HF Blade in a matter of seconds, able to block, reflect and cut bullets, projectiles so small with a simple sword and to this we must add that he performs numerous maneuvers and movements against people as skilled as him as soon as he obtained it. At the same time that he obtained the HF Blade, Raiden fought against Solidus Snake, one of the Three Terrible Infants, who was supposedly stronger, more skilled and experienced than Raiden and already knew his movements as he was his master previously, and yet, Raiden was able to defeat him.
Solidus Snake is a perfect clone of Big Boss, who is not only capable of fighting Solid Snake but should even be comparable to Big Boss himself, who is able to go from being Skill Stomped by Ocelot to being able to compete with him. He also shouldn't be far from his brothers Liquid and Solid Snake, who are geniuses in combat and both can actively fight, even though Snake is capable of instinctively using CQC which can be performed with a variety of moves, and is constantly limited against people less skilled and stronger than him to use non-lethal moves.
That weapon of mass destruction wasn't more powerful than Raiden. Metal Gear RAYs were basically going out of fashion due to cyborgs and Raiden was dogwalking it. Fighting something you can overpower and throw like a bowling ball isn't much of a skill feat. At least Phobos in the context of the series is just as vulnerable to weapons as the rest of the cast is and can still kick ass.
Raiden has faced Metal Gear since before he became Cyborg. In fact, in MGS2, he faced several Metal Gears and even defeated some. So he has experience dealing not only with people more skilled than him, stronger (to the point of one-shotting), or even massively bigger and heavier, but he even surpasses all of these experiences to a great extent in MGR.
Even if this were a more advanced key, Raiden might be able to fight and outmaneuver a supercomputer like Blade Wolf, however I don't know if that is retroactive or if it would somehow apply to this key.
Literally the only feat listed on his page is easily learning how to use a sword within minutes. Is there more to that justification i'm missing that he did shit?
Raiden masters the HF sword in a short period of time and then overpowers Solidus Snake. However, I think there are more reasons, but I'd have to investigate or ask another member.
Now that I see the justifications, Raiden and Hank are actually relatively comparable ngl. However, I emphasize once again that Raiden can still compete and even surpass Hank as the fight progresses. At least it's not a Skill Stomp. But Hank still has to deal with a speed increase from 2X to 10X, in addition to the fact that Raiden will be disarming and slashing him with extreme ease every time he swings the HF sword.
