The poster asked which FATES give the most GC seals... NOT "Hey, I'm going to ask a question, but everyone please go ahead and not answer my question, disregard it completely, and then suggest other things that I simply didn't ask for." Typical forums. Here's the best , and quite honestly the ONLY answer: The Azim Steppe. A central aetheryte on a nearly square-ish easy to play on-the-small-size map. I grind those last few GC ranks on alts there with a couple friends nailing 20K seals in no time. Easy peasy.