I suggest a solo marni chamber for Oluns, so that single players also have the opportunity to grind this piece outside of a group. The Oluns in the Marni chamber should be adjusted so that you can achieve the same amount of trash as in the group spot. The fact is that this piece is the biggest bottleneck. Meanwhile, the Normal Oluns spots are also occupied by rushhours. Sometimes by overgeard players who grind there with 3 DPS because nobody wants to play a Shai. These players also don't want to grind Dekkia because they don't care about Deboreka earrings. It's purely about ringpiece.

We have a mana chamber for all "old" Treasure items except Oluns. The former trade option is now gone and was as good as impossible for the Olunspiece.

And to all those who think it should remain group content. There are also players who have a job and would also like to achieve these achievements but are unable to do so. BDO regarding PVE singel game. I have nothing against group content, but it's not WoW where the focus is on group content.

I have read many suggestions here, including exchange possibilities.
But I think a solo camo chamber makes the most sense.

oh no....group content in a mmorpg....

No

Even if they do this, imho the solo spot should not yield as much trash as the group spot.