Once you've unlocked your various relic materials by going through it the first time, my suggestion is, if you think you're going to do more relics, be very cognizant of your poetic and GC seals at any time and burn them on future relic materials whenever you're close to cap. That way whenever you get around to the next one you want to work on, you've already got a stockpile of materials waiting for you and can just burn through the easier steps very quickly with those.