For Circle of Faith it would be nice if beating Uber Abbaroth (Or a new Uber fight) gave you an option to take an LP unique and destroy it for (a chance?) to store the LP, to later place it on an item later.
So in detail: since you are already beating the pinnacle content multiple times, you can pretty much beat all content already. Merchants guild would at this point, if the items are available, also have 4LP items available, more so than COF. Giving it an advantage in min/maxing your characters.
Another issue you run into in COF is you will want to save various high LP items, since random drops instead of an auction house means you might take weeks to even encounter that 3LP item again.
What if after beating Uber Abbaroth there was an option to destroy an LP unique to ‘‘store’’ 1 LP, building up to 4LP for that specific unique. For balance you could say it needs to be 2/3LP minimum to qualify, and each unique only gives 1 LP stored. Sso you’d still need to sacrifice 4 high LP uniques to eventually make that 4LP Bis item. Or make it a 1 LP minimum, but there is only a % chance to store the LP.
This would stop the need to hoard high LP uniques just to be safe, give a semi-deterministic way to get that eventual Bis item, but still stagger it enough to not unfairly outpace Merchants Guild.