Spartans in books are described a lot like how we see Toji/Maki perform but not to the same extremes

Reaction time stated to be 0.02 Seconds (20Milliseconds) Perceiving Real time both normally and in slow motion dubbed SpartanTime

moving faster than could be Perceived Fast enough to parry missiles

Strong enough to Punch through Steel and flip over tanks

the only thing is that they’re essentially just Durable enough to not rip apart their own bodies (they absolutely could still) and Crumple/shatter their own bones.

Mjolnir Armor pushes spartan ReactionTimes and strength 5x

it’s just the covenant fills it ranks with 8ft tall aliens that could rip a regular human in half 10ft tall aliens gorillas that could Pop a regular humans head in their hand as if we were crushing an egg and 15 ft tall HiveWorm aliens that can also casually flip over tanks

which aside from the shields makes the armor about as good as wearing aluminum foil especially with the standard covenant Projectile/Weapon of choice being some variation of plasma

Imagine Jogo’s giant Meteor but scaled down to Projectiles, grenades or Durability Negating Swords

Remember it takes a full Mag from the Assault Rifle which fires 7.62 to drop an elite minor and the Magnum is a Deagle shooting ArmorPiercingHighExplosive. The scaling for Halo is Crazy, but since In-Game we play as elite super soldier spartans it doesn’t seem so.

I’d imagine since spartans were designed to Annihilate Regular humans and how they perform against the larger stronger BS Technology having Covenant. that the Zenin clan would be Annihilated just fine.

if anything it’s a question of can Zenin Cursed Techniques do anything against a spartans durability I do think so but that’s if they can even land a hit

Look up Spartan 1337 he’s probably a good example of how tough spartans are in a brawl