This guide will be from a tanks perspective, mainly PLD since that is what I use 95% of the time.

This boss uses a horrible move called "Tail Screw". He also will put a "Slime" debuff on random players. This boss will also tether to the tank with a "Prey" debuff. While the "Prey" timer ticks down the tank will be hit with a move called "Stun Claws" which will stun the tank while it uses "Tail Screw" on a targeted player.

The biggest mechanic of this fight is mitigating "Tail Screw", while most parties do this with the healer "Esuna/Leeches" the "Slime" debuff and blasting out a huge cure on the player targeted by "Tail Screw".

The first two "Tail Screw's" will be stun-able by any job since it is not preceded by "Prey". Once this boss starts using "Prey", you have two options. One - Have a DPS stun "Tail Screw", or Two - Have the Tank stun. Now I know you are asking yourself, if the tank is stunned how can he stun the "Tail Screw", This my friends is where the fun starts!

Either the tank and pass the "Prey" tether to a dps (Think Allagan Rot in Turn 2) or the Tank can use a defensive cooldown + stoneskin, to force the "Stun Claw" move from the boss to hit for 0 points of damage, in effect rendering the stun as a miss. From here the tank can go ahead and stun Tail Screw. At some point the boss may build a resistance to stun. Though in my last fight I successfully stunned 4/6 "Tail Screw's".

So happy hunting everyone, hopefully this guide makes this boss a little easier on your healer's MP pool!

Great work on this guide! Very thorough, lots of good information on a very misunderstood fight.