Fates literally do not scale.

[Kallera]

Some FATES also need to randomize the spawning points, a number of FATE you will see Thaumaturges/Black Mages spamming Blizzard II over and over in one spot because the enemy NPCs always spawn in that same area. It's a nightmare for melee classes.

It's even more annoying when they technically spawn just outside of the FATE's designation area circle.

The Redbelly hive one is the one that comes most to mind.

"It Ziz what it is" and "The Prodigal Son" also suffer from that problem. One or two well timed Wide Volley and I'm in Gold.