Wakening essences can drop from sources similar to
Writhing essence. This means that you can obtain Wakening Essence from the following:
- Weekly Mythic plus chest (20, highest level cleared doesn't matter).
- Normal/Heroic/Mythic Antorus bosses (3-6 per boss, per week, regardless of lockout. I will assume lfr counts like before)
- Emissary caches (4-10). Emissaries saved from before the quest do count, unopened boxes do not.
- Daily Legion Heroic dungeon (5)
- Weekly PvP rewards, ie: earn 1500 honor in 2s, 3s, and rated battlegrounds (7 from each)
Assuming seven emissaries, a full clear of Antorus, one mythic plus for your cache, seven daily heroics, and all three PvP weeklies, you should be able to earn about
175 essence per week on average.