Is it possible to beat turn 5 with no mage dps?

[Poringing]

Just follow what Lithera said and you'll be fine, for the snakes that is.

Twisters and dreadnaughts on the other hand, you may need image links or ASCII art to plan out. (assuming the worst case scenario, 2 tanks, 2 healers and 4 monks)

[Zdenka]

Have PLD OT stand where Dk Spawns, other 4 MNKs 2 on each side of him, everyone run directly back for twister.

For DK all melee just stack on the DK spawn, 4 MNK should be able to burn it before the ~9 second chain stun from the PLD is over so even if one of the MNK is chosen it shouldn't matter.

And since MNK is the highest single target DPS, with the echo buff now you should transition into the final phase before the 2nd DK that has twister during it. Liquid Hells will suck with everyone in melee range but it just means that phase might take longer.

[Itseotle]

Just follow what Lithera said and you'll be fine, for the snakes that is.

Twisters and dreadnaughts on the other hand, you may need image links or ASCII art to plan out. (assuming the worst case scenario, 2 tanks, 2 healers and 4 monks)

Its really not an issue as long as no one crosses each other's path. If you all run together in a straight line, that'll dodge twisters as well.