Ok...let me level with you here SE...

[Insaniac]

presuming a large ls of 18 starts killing using all 18 to lower the chance of wipe about how many days would it take for it to boil down to losing entirely new relics just attempting the thing? It seems like if the entire group went and farmed currency for one person they could make a relic or close to one before the trial even finishes.

Using conservative estimates and assuming people duo farm instead of solo since not everyone has a solo job leveled, 18 people could farm enough currency for a new relic in about 8 days. One day longer than it would take to finish the ADL trial assuming a 75% win rate.

Conservative
9 groups of 2 x 200 currency = 1800 currency per day
highest possible relic requirement not including the final 3k 15300/1800= 8.5 days

Realistic
9 groups of 2 x 270 currency = 2430
15300/2430 = 6.29 days

Possible but not likely
18 solo well geared BST or DNC x 175 currency = 3150
15300/3150 = 4.85 days

This is all assuming no white procs.