As someone who play dancer and bard, probably 2 of the mot inventory limited jobs in the entire game, I agree being able to combine some set items into one effect would be nice.

Having 8 elemental obi vs one super obi is definitely a good balance. It has absolutely 0 difference in power level, so it's only difference is its inventory +7. Really want to balance that? Add some kind of charge Sagheen style to make the upgrade. 100K? Some random synth items? Whatever. Other than that a single super obi is the exact same level of power compared to all 8 obis in possession.

Not sure about the staves, since several of them have other effects on them (hMP, cure potency, crit rate, -pDT etc), so the received staff would have to have a mix of these yet not be broken. Or maybe the rainbow staff would just only have "enhances magic" listed as its effect, and it gives +1 affinity to each element, +2 for the HQ.

Once again, power level wise that is actually still balanced, it just increases inventory space. A black mage with 8 staves that give +1 affinity each vs a mage that gives +1 affinity to all elements are both nuking for the same damage, one just has more room than the other.

So once again add some kind of NPC charge for the combination and then call it a day. I'd be willing to trade some gil for +14 inventory on my bard.

It's part of what makes Gjallahorn such an incredibly powerful tool for bard, it turns what normally would be about 8+ instruments for various songs into one catch all instrument that works for everything, and when inventory is so so so valuable that makes it an epic instrument indeed.

As for AF, I don't that that'd quite work, let me tell you why. As a dancer, I am tight on inventory space, why? Unlike mot other jobs, 4/5 of my AF, 4/5 of my relic, AND my entire empyrean armor set are ALL 100% applicable at lv 99. Only AF legs and relic hands don't have an incredibly powerful macro effect for one of my job abilities. The rest of my artifact armor gives huge bonuses to my dances and requires being in my inventory at almost all times.

However, AF feet have +jig duration, whereas reli feet have +step acc. Those are totally different pieces to be used in totally different situations. We can't really just combined everything I think, so that just requires general dealing with it.

However I am sure there are other items that are part of a "rotation" or "set" that we can combine into one. SE has actually already done this as we all know, just look at ninja's "catch all" tools they have recently been given. This is a perfect example of a huge +inventory boost to ninja.