Give the possible Eureka 5.X its own weapon, and separate Relic from it

[Jandor]

You also have the tome weapon, on par or better than both the relic and the primal weapon for almost the whole expansion life cycle, which is the weapon you can obtain by doing instances, hunts, beast quests, Eureka, Deep Dungeon, and probably several others means, with an additional requirement for normal raids, with artificial time gates so that you don't have to use the most efficient method...does this sound familiar ?

Fine...

You have the raid weapon, the best weapon but hard to get.
You have the tome weapon, the 2nd or 3rd best weapon, easy to get but time gated.
You have the primal weapon, 2nd or 3rd best weapon, requires skill but can be acquired quickly.
You have the relic, anywhere from 1st place to 4th, depending on patch cycle.
You've got crafted as well, for the quick but pricey jump start.

Ok, now we've fixed that, where is this hypothetical sixth weapon going to go?

(Technically we had a sixth weapon in the form of the HoH weapon, but you barely saw anyone using it even when it was vaguely useful because grinding for it when the other options exist was a waste of time.)

Also, an old fashioned relic grind seems pretty redundant, as you point out a grind already exists where you can do a whole bunch of different things at your leisure in order to get a decent weapon.
Maybe alter how the augmented version is acquired, slap a bunch of particle effects on it, call it a day...