Discrepancy in lore (spoilers)

[Vyrerus]

I'm a Berserk fan

That's cool that you like Berserk, but Guts is nowhere close to the power of the Warrior of Light as they are by Stormblood. Not even in the Berserker Armor. Much cooler and more fun to ruminate on, sure, but let's leave other fiction at the door, ok?

I said DRGs, cause that was just one idea, specifically for taking out the Sky Armor pilots. One big weakness for almost all Magitek personal vehicles is that the pilot is exposed and not even strapped in. There are loads of other ways the Eorzeans could prepare anti-air contingencies. They don't, because it's not conducive to giving it a cinematic feel.

Also keep in mind, Magitek armor runs out of energy/sky armor runs out of ammo. They will have to go back to reload or engage with their claws and grapples, as they do as regular enemies in gameplay.

If Pipin were a thinker, and he had accounted for the possibility of Sky Armor, as Lucia remarks afterwards in inbetween dialogue, they could have had anti-air contingency in place.

As for Magitek being > Magic, well obviously it's not. Your average Magitek armor is better and more reliable than a novice mage, but any veteran mage can literally blow the pilot and the armor apart.

And then lastly, as far as how strong Hien is... well remember he didn't hold off Elidibus possessing Zenos by himself. He was backed up by Yugiri and Lyse. They barely held their own, and canonically Elidibus could not fully replicate Zenos's technique, instead falling back on his Ascian dark magic.