So... yeah. Never bothered because of not really having enough time to dedicate to it. I stopped at i200 for my SCH book before I gave up.

However now that I have more free time, a lot of stored tribe tokens and no use for poetics and Eso's, what would be the most efficient way once I use up my stockpile? I'm thinking just keep doing Beast Tribes and grind Aethero until my mind breaks.