Stacking RNG on top of RNG is one of the biggest issues.

Light gains aren't consistent. The only consistent source of Light is NM"s...which are spawning less and less often due to the lack of players in the zone. There's some NM's that I haven't even witnessed with my own two eyes. That wasn't the case with Anemos, since people would spawn each and every NM if there were enough people in the zone.

I'm done with my RDM relic. Usually I'd casually work on PLD as well. I just can't bring myself to do that. I planned to do so by farming cold-warped lockboxes since I wanted the emote that drops from them. Again, RNG on top of RNG. You only get those lockboxes from a specific enemy. Even then, they only drop if that enemy mutates...and only one or two people in the group will get a lockbox each time. Some days I've walked away after an hour with ten lockboxes. Other days I've received only two. That isn't fun, especially when you go to open them and receive materia.