Queue into Levelling Roulette as a SCH.
Get into Toto-Rak. Cast protect, summon fairy, pop cleric.
Tank seems a bit new-ish at tanking, as I pull hate on a couple of mobs during the run, but not a big deal.
SMN seems to know what they are doing. Rogue is unsynced.

Get to the first blue device thingy (that pops the 1st raffalsea mini boss).
Rogue runs off down the other corridor about to pull some mobs.. Ends up turning around and joining us, didn't think anything of it.

Few mins later, we are a bit further in.. I thnk to myself "hmm where is that Rogue? they keep disappearing".. Next thing I know they are half way back toward the start of the dungeon dying to a bunch of mobs.. You know how the path "splits" and there are two routes? well we took the lower route, then for some reason the Rogue doubles back along the other route after we clear the Chigoes...

Anyway I heal the Rogue up, not a big deal, only 2-3 extra mobs and the group that the Tank, myself and the other DPS were killing were nearly dead anyway..

Couple of mins later I look around... "Where did that rogue go again?" I think to myself..
Sure enough I see their HP dropping in the party list.. Here they come screaming back with a good 6 or so more mobs, while the Tank and SMN are killing the 3 mobs that we originally pulled.

I send my pet away so Eos doesn't heal the Rogue which would put me on the hate list for this army of mobs that the Rogue randomly decided to run off and pull, let the Rogue just die, the mobs leash and I raise the Rogue.
What I expected to hear from them if they said anything was "Sorry about that, didn't mean to pull this army of mobs."
Instead....
First thing that they say - "Turn off cleric!"
I mean.... I have managed to do the entire dungeon with cleric on, while fairy healing on Obey and DPSing full time. Why would I toggle it off to heal them, when they ran off to pull a bunch of random - unecessary mobs from some random corridor that we weren't going to go down - which would only cause me to get hate on those mobs, and potentially die myself or end up tanking 6 mobs by spam healing myself since the Tank seemed new-ish...

Ok so I respond with something like "Nah, don't pull random mobs from god knows where. You're not a tank."

Anyway.. Get to the final boss, tank pulls - what does the Rogue do?
Of course they decide to run around the outside and run into all the poison sap thingies that blow up and poison you. (Keep in mind I am on SCH so I don't have any form of Esuna at this level).
The tank then seems to want to follow their lead and goes off to kill the poison egg thingies..
Meanwhile I am sitting there face tanking the boss, completely dumbfounded by what was going on... No one died because I mean.. Eos..

All I said was "Yeah, no. Don't do that". (Was trying to keep everyone alive so couldn't elaborate).
Rogue said "Let the DPS focus on eggs" - "Tank do your job"..

I mean.. Do people not realise that you literally don't have to touch those eggs on the outside of the arena at all?

None of these people had sprouts so they had obviously done the dungeon during the story at some point.