Jon Chung
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But unless they had a mentor to teach them about all the Charms they could learn, I don't think they would know that the paranoia combo was possible, on account of Charms not being on a convenient list you can look through in-universe? They are, I believe, instead things that develop as extensions of stuff you try to do? Like, you don't get Heavenly Guardian Defense by investing in a Charm tree which you know leads to a perfect defense, you get it by constantly trying to parry harder, until one day you can parry perfectly.
So someone who fights at range would not go out of their way to develop Melee charms to get a perfect parry, and someone who runs around in superheavy plate would not go out of their way to learn dodge charms to get a perfect dodge, no matter how optimal it might be to do so.
Sure, you could argue that and enforce it if you wanted. Then the people running the suboptimal builds die and respawn until someone happens to spawn with Dodge favoured. Same end result.
The problem is not the paranoia combo exists, remember, the problem is that it is the only way to not die.