nah. GC doesn't play a part. It's level and armory bonus. Those fates that give good xp now give good xp +50% when you are playing a class lower than your highest class.
As for dd, killing lambs is great, but the fates alone are worth about 60k with armory bonus and some levels (maybe more, i always forget to tally the golds properly). It's a four part chain. On the other hand, Go go, gorgimera gives like 40k by itself with armory bonus.
Short answer is yes. 'super fates' are all over. The ones with big mobs generally drop a minion if you get gold. At max level there is also Odin and Behemoth that you can get tokens from to trade for gear.