Im glad this is catching on now!

So for the fates I'm thinking to make it like a Monster Hunter like
they spawn like Hunts.

Let's take the Yian Garuga for example:

- It spawns in South Shroud
Attacking from the Rear,Flank,Front has a chance of breaking off items used for rewards. (i.e. Garuga Scale, Flame sac etc) and increases damage taken from that area.

Also the amount of damage dealt from let's say the right side can stagger it or make it fall over and gain a Vulnerability debuff until it gets up.

After time passes it'll fly to a different area North Shroud

Pretty much the same deal but it can become enraged and attacks will become more powerful cleaves.

And why not throw in a Frenzied mode.

The quest giver could sell things like pitfall traps paintballs or generally things that help you track things down.