Alright this is probably the most difficult Ultra amongst the ones listed here. This information is mainly from the Misfit guild.

4 Man Taunt

Red zone counting method by Mathieu:

You have a 2 second window to taunt after the yellow messages appear.

Learn the following lines related to your class, and count the red nukes during the fight to nail every single taunt.

LR: Stay inside 1st RED, taunt LISTEN after 1st and 3rd red zones.
AP: Stay inside 2nd RED, taunt right after 2nd and 4th red zones.
LoO: Stay inside 3rd RED, taunt right after 1st and 3rd red zones.
QCM: Stay inside 4th RED, taunt 2nd truth after 2nd and 4th red zones (and you run out of range when it says listen).

Class jobs during the fight:

LR: Use decay (skill 2) when red zones appear to prevent Malgor from healing.
AP: Spam heal (if possible heal BEFORE red zones)
LoO: Spam heal (if possible heal AFTER the red zones)
QCM: Focus on damage.

Enhancements:

LR: Arcana, Lucky, Lucky, Vainglory
AP: Ravenous/Valiance, Lucky, Base Forge, Pentinence/Lucky
LoO: Awe Blast, Lucky, Base Forge, Pentinence
QCM: Ravenous/Valiance, Lucky, Fighter, Pentinence

Consumables:

LR: Fate Tonic, Potent Destruction Elixir
AP: Fate Tonic, Potent Destruction Elixir
LoO: Fate Tonic, Potent Destruction Elixir
QCM: Fate Tonic, Potent Destruction Elixir

QCM can be swapped to VHL or SC.

3 Man Taunt

2 Man Taunt

1.5 Taunt