Some zones are noticeable better to farm Fates. And those would be Churning Mists and Dravanian Hinterlands - maybe some Western Coerthas if you are having problems with being low level at Churning. I was leveling a bit in Sea of Clouds and Forelands, while doing the Anima farm in those zones, and it goes MUCH slower. Probably because stuff don't die fast enough, or Fate spawning is slower.
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I recently had a tank in Keeper of Lake. After first boss, while he tanked the imperial mobs, me and the bard got the shield down and released the Iron Giant. Pretty standard stuff, every single run does that. But the tank got afk, saying we could tank if we wanted to. Me and the bard managed to kill all adds, since the ehaler was good, but that enraged me. I promptly kicked the tank, and the bard and the healer praised me for doing so.
That took balls, since I discovered Level 50 rulete has a shortage of tanks lol. Had to ask a FC buddy to finish the run with us. But I don't regret being a hothead one bit.