If you’re looking to increase your Renown with the Loamm Niffen faction, it’s a good idea to wait until Sunday to use any reputation tokens.
Darkmoon Faire returns this Sunday with its +10% reputation buff. During the Embers of Neltharion campaign, you will gather many Loamm Niffen reputation tokens. If you do not use them immediately and wait until Sunday, you will receive +10% more reputation.
Example: If you have a +2500 rep token and wait until Sunday, you will get +2750 rep.