Question from an inexperienced player

[Zetsumei_Tsunarashi]

And completely congest your Armoury if they aren't sharing gear. But Anima is right. Just unlock everything, even if you're not going to use them

You can just throw away those level 1 gears if you don't plan to immediately level the class right away. All of those weapons are available from NPC vendors in their respective cities.

Unlocking all the gear sets is definitely a good idea. It's one of the first things I did when ARR launched.