To max out on the Artifact, many players have maxed out their crafting and gathering jobs, but as of now, there isn't real value in gathering anymore and using the jobs just once or twice, for the artifact seems like alot of work for a single use instead of what could be horizontal content in my opinion.
I suggest 2 new item/stat lines, with the first one being introducable right away or with a future zone:
Implement a rare additional drop to the existing ores, herbs and woods each and a crafting recipe that takes all those and about 10 purple gathering materials to build a single item that yields a stat
Those stats should be on par with legends or dark will stats and should hold the same variety as the stasis stat line.
Since these stats would be farmable outside of instances, it is crucial that the rare drops don't have a to high drop chance. I suggest that power farming gatherables should result in a stat every 30 to 120 min depending on gather bonus and efficiency of the player, making gathering tools more interesting and giving players the opportunity to farm stats while questing in talagan without being forced into raids or endless amounts of minigames.
The second line on the other hand should be part of upcoming raids and mirror the highest stats or even expand on upcoming endgame gear. i'd call them the Magnum Opus line:
By combining a vast amount of ressources from gathering (including the previous mentioned rare drops, maybe material from minigames and maybe even new materials introduced in a new zone) with rare materials that can be optinally gathered in new inis/raids, these items can be crafted. I suggest that the upcoming inis have non combat related optional parts like a jumping minigame, hidden treasures, a randomized puzzle, a quiz... (if you decide on implementing something like this, ill gladly pass additional ideas or expand on this) to give people another kind of challenge and reward them with for example a single ore vein of the highest grad that in turn needs to be farmed for the magnum opus. These minigames should be random and not in every run, making them rare and valuable for those daring enough to take on the challenge. Optionally instead of placing these minigames inside a raid, maybe drop an entry key from the endboss, placing those minigames in a seperate ini