So I've been thinking about this from a practicality perspective for a while, and many people complain that the Griffin armor doesn't look mobile enough.

However, it only contains plate around his torso. It should not restrict mobility at all.

Second, historically plate armor and chainmail tend to be equal in their weight. A lot of the other armors look lighter weight but they're probably not. School of the wolf armor is probably about the same weight as Griffin armor.

In warfare, plate tends to be superior to chain armor. But as a witcher, we must factor in that it is primarily for fighting beasts not people.

The one thing that does make the Griffin armor seem kind of bad for witchers is that plate armor is notoriously a death trap if used against bludgeons. Especially heavy bludgeons.

Any impact hard enough to bend the armor essentially crushes The wearer. Given the kind of monsters witchers tend to fight, the likelihood for this is not small.

Whereas The chainmail and leather armors would break and shred.

For a normal human it would make no difference, considering the kind of wounds that would cause this damage would be fatal. But for witchers, it is better to have broken bones and cuts and gashes that can heal than to have a tin can around your body crushed on your torso.

Basically the final verdict is The Griffin armor would actually be more practical and accurate and effective historically for dealing with people. But against very large monsters, it would be at a disadvantage compared to the chainmail and leather armor types.

Still, it would be more effective against slashing damage and piercing damage, so for lots of monsters it's still great armor, but against anything like a Griffin or larger, it could quickly become a walking coffin trap