Shadowlands editions

Hi, which shadowlands edition should i buy? i see that the epic edition brings a lot of things, i’m most excited for character boost and 30 days game time, but it is really worth it? the rest of content in epic edition is really good? i took a pause from the game and i want to know which is more convenient? or i should buy subscription and the shadowlands base edition or heroic edition? i know that character boost is 60 euro and that’s something good to have on the heroic and epic edition