But after the initial effort, you can keep up within an alt by doing the weekly major attack, the biweekly lesser assaults, one Horrific Vision, and Wow gold classic whatever daily minor dreams you manage to squeeze --people tend to only take a few minutes. You'll end up with two essences for your Heart of Azeroth mythical neck just from doing these measures, plus another if you participate in this Ny'alotha raid on that character.
The Worldvein Essence, obtainable by running the weekly Island Expeditions pursuit, is comparatively simple to obtain and has been recently buffed substantially, becoming of cheap wow gold the best essences for some courses.