Primal weapons: to upgrade or not?

[Allesasi]

So we have six primals and six elements - one for each.



In short, make the weapons situational and useful in exploiting elemental weaknesses - including against rival primals.
A Shiva weapon would then work wonders against Garuda, who has an ice weakness. Likewise an Ifrit weapon would show Shiva who's boss.

This would kinda force us to get all of the weapons I guess!