I’m finding that I can just about keep pace with my own demand by alternating between one and two cantina refreshes per day - just about to unlock my third GL tomorrow and I will have enough to R7 immediately, but there is no stockpile built up beyond that.
As always, personal mileage will vary depending on the usual suspects, the better you and your guild perform in other game modes, generally the higher demand you will have for relic materials.
Things like:
Spending habits/crystal income from arenas.
Raid frequency and in particular average reward placement in STR.
GAC performance.
Guild TW/TB performance
Galactic Challenge performance.
Assault Battle performance (this one is actually a bit of an outlier, as the more Challenge Tiers 2 and 3 you can clear, the less you will need to rely on Cantina farming).
