Relic can be a decent weapon for the patch it's in, but will ultimately be outclassed by any new gear from the next major patch, or the savage weapon from the current patch.
They're mainly sought after as glamour.

That said, during downtime, it's common for people to grind out a relic, for achievement's sake.
Given that this iteration of the relic is tied to Bozja, it would be advisable to do it now rather than later, as Bozja engagement will only decrease, making it harder to grind out in the future. Similar to the last expansions relic and Eureka.

Basically, if you don't give a damn about glam or 'casual' achievements, ignore it. If you think it's something you will want to have done in the future, do it now.

Additionally though, the Bozja content is pretty meaty story content in it's own right, and similar in scope to an Alliance Raid series like Return to Ivalice. (which it in fact leads on from directly) So even if the weapon itself doesn't interest you, the content itself might be worth running at least once for the story.