I understand that it is possible to clear this fight as a ninja on party finder.
However, I'd think some changes are needed for ninja's aoe capabilities that I've found lacking in sustained aoe fights.
Ninja, for dungeons at least, is strong just for their burst and their ability to recharge mudras immediately between packs, however, if it takes a while to pacify a pack, it struggles as not only are the normal aoe combos incredibly weak, their ninki buildup for a frog is barely a gain over bhavacakra for 3 targets, it is still a gain, but it is small.
We have no fall off damage on our mudras, but that comes at a cost of a mudra, which we'd have to choose to do damage immediately or prepare for another TA.
In m6s, I find myself needing to use raiton more than the supposed aoes needed due to how weak and limited our aoe is when there is a target that MUST be dealt with asap to the point single targetting and only giving out a frog is preferred due to how fast we must eliminate these targets.
Mug being a 120 cd makes it hard to get value out of when there are no targets to target for it that makes it worth doing so during the fight. This usually leads to a delay of it and it is to reallocate resources just for a certain comp, to deal with an issue before it affects the 4th wave.
We have bunshin, and honestly, just for this fight, it feels like this should be 60 seconds due to how much we're lacking and doton takes a while for the full value of it to be taken and it isn't much either with hollow nozuchi.
Machinist also suffers a similar issue as ninja, they've got decent single target options for the cat at the very least, and 2 chain saws they can assemble.
But their auto crossbow, an aoe tool, is bad because it can't even recharge the ogcds it has and flamethrower's a joke to use, it builds no gauge at all and it is effectively a worse auto attack on a server tick.
Obviously, we can't pad out the time before death occurs by the jabbawock as fights are scripted and doton slow while nice if it worked, would prolong certain events as the fight will still go on and possibly cause issues while pulling the pack around.
At the very least, their aoe combo should've been buffed or generate a lot more ninki than it should without bunshin, even the frog could use a buff to finally be a gain on 2 targets, we don't have an aoe version of raiju, and tenri is at least a tool we can use to allocate damage somewhere else in a 30 second window.
Meanwhile, with a DD, VPR easily resolves the adds for obvious reasons, they even get 3 katons for free that comes with ogcds despite the damage falloff.
i had too many text