I'm having difficulty understanding what you mean here. Do you mean tome purchased items such as Weathered equipment or the relic quest carrying you through its challenges?

i52 isn't difficult to obtain. If you're a crafter of at least LV50 or know one, have at least a small sum of gil or willing to run the easiest LV50 dungeons you will get that ilv quickly.

Crafting i55 equipment doesn't require melds or a completed crafting questline and the dungeons are something stupid low ilv requirement like i48, if it even has one - which drops i55 gear, including weapons.