Upgrade Gear
How to upgrade gear in WoW Midnight — no valorstones required but you do need more crests
The gear upgrade system has changed in World of Warcraft: Midnight and you will no longer need valorstones to upgrade gear, only Dawncrests and gold.
How to get and upgrade gear from Korthia daily quests
I'll say this up front -- I hope you end up liking the Archivist's Codex and their new resource, Catalogued Research, because you're going to be spending a lot of it in patch 9.1, thanks to the incoming catch up gear mechanics that will be coming from Korthia in the upcoming patch.
