Detreus.5082

Hello! I'm a solo player that is aiming to get the backpack for Ad Infinitum. I'm currently stuck in T1 because of that timed mechanic. Then I noticed that there are more timed mechanics for the remaining tiers. I've tried asking the 4 guilds that I joined but they just ignore the message. So I'm Looking for the best way to finish the timed achievements (Ex: Solid Ocean) for Ad Infinitum with PUGs. Any suggestions?