LogFAQs > #943297517

Well let's see

420 per week from event dailies (60 per day. Hard to know if they will always be there)
350 per week from standard dailies
300 per week from weekly quests
350 per week from standard login bonus
~500 per week from arena rewards
1200 per month from Arena battle pass (let's call it 300 per week)
2500 per month from Tower (so 625 per week)

So you're looking at around 2800-2900 gleamstones a week not including any sort of bonuses from extra login bonuses, compensation, clearing stages, getting characters affinity up, etc