Stars/lamps when they are 75% off, keys at 50% off if there's a really good TH event. You can typically make back your oddments by converting the bigger, less useful drops to oddments
Limits per day:
Medium prismatic lamps: 30/day
Medium prismatic stars: 50/day
Keys: 30/day
This post was edited by Soroush on Nov 25 2021 12:04pm