I won't leave any complaints as I did it because I am an idiot with an addiction to collecting, but I would like to say it took me over 600+ fates (probably in the 700 mark actually) to obtain all minions + all legendary weapons. One key to this was I had 2 of them (though there are 3 in total) in Outer La Noscea that I left for the 30 legendary portion as the 2 fates in the mines endlessly respawn. Had I not done this I imagine that number would be much higher, but I also could have been extremely unlucky. Best of luck to those going after the Whisper a go go mount as it's quite the grind.

I highly recommend a subscription to netflix, audiobooks, streams, or just catching up on shows.