so... how the hell do u beat captain madison in satasha hard?

[AzakaTonnerre]

He does a debuff on the MT and after a few seconds he stuns the person with that debuff. Another player (melee) should go hug the tank and get the debuff from the tank. This way the tank does not get stunned.

The huge damage move the boss does can be stunned, so that is why it is good to avoid the tank being stunned, so he is free to stun the boss

The huge damage move also does not kill the person it hits (at least it didn't in any attempt we tried) if they have decent remaining HP. It literally leaves them with less than 100 HP's. What kills the person is that it poisons everyone before it does that move. So one click after the tail move they die from poison. When we won our healer just cast esuna on whomever the Tail move was going to hit (the are identified by a targeting line from the boss to whomever its attacking) before it landed. After the hit, she just casted cure to bring their HPs back up. It was easy that way (though I can see the possible difficulty identifying whom it was targeting).

*disclaimer: If I am wrong and we just got lucky I apologize to anyone for the repair costs they accrued attempting this.