The problem is you need a specific set-up to kill ADL. Shout for people who recently finished relics and you are going to get 3 BSTs 4 PLDs 2 THFs and 3 DRKs. Good luck getting the WHMs SMNs and CORs.
Edit: You know this is probably why SE thought that item trials would be a good idea. It frees people to go on whatever job they want so that finishing a 99 guttler or claustrum(lol) doesn't become impossible. I don't know how they couldn't have come up with a better way though. This just seems so incredibly lazy. They could have added a random drop item to normal dynamis mobs that you get around 20 of per run and need 500 of. There are so many better options. Timed dynamis NM kills or just a simple 1000 currency.