I really hope so.
The reason I didn't get the individual sets is I don't have the inventory space to have 13 sets of gear (one for each job)
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Lower Ilv than Tomestone lets say ilv 370, 5 materia slot. Nothing more, nothing less.
I don't see why they wouldn't, by the end of the expansion cycle relics typically are the same ilvl as current raid gear, we don't know what the work will be involved for relic armor this time around though, if Pagos style is any indication we have plenty of work ahead of us just for the weapon let alone the armor, plus this content is supposed to stretch till next July when 5.0 presumably launches.
It's doubtful that the armor upgrade will go past i380 with 5 materia sockets even near end-of-expansion, considering the upgrades would likely come from whatever the next leg of Eureka is and they didn't do an armor upgrade in Pagos. I highly doubt we'll see another armor upgrade after this.