Pretty much what Morrow is saying. There is no reason in not running it if you already have it and are chest farming, but the prices at what the trophy pieces are going at is outright obnoxious for the amount of luck you get from them. The loot tables are still at 100,000 - just like Mining etc. The percentages between loot luck and mining luck are the same as well, but not the trophies which is very minor in comparison. A max tier loot luck trophy is 150, so even with 3 of them you're at 450 luck from trophies. In comparison, Mining Loot luck trophy is at 1500 for just one. Full perfectly rolled loot luck gear at 600 GS with socketed pearls is something like 3750 adding up to a total possible 4200 max. So you're much better off just buying a really nice piece of gear (in any slot) that gives a large luck bonus and building up your luck gear set and.. if you just so happen upon a loot luck trophy.. wait what am I saying, fk that, its still not worth building - sell that shit.
You're able to pull from the top tier loot bucket starting at something like 1800 or 2200 (was unsure of that looking at the strings). I understand "why" they dont want loot luck up as high as something like mining, cause the market would be flooded with Legendaries. But again, a max tier loot luck trophy is just not worth the total investment at the prices they are going at for right now. I personally think the artifacts, for as worthless as they are in the grand scheme, should have a much higher drop percentage.