let's see
last month I had, in the span of a bit more than a week:
an E12N that had to be abandoned because both healers wouldn't use anything but the base low level spells of their class, no OGCD healing usage at all, who were toxic to everyone involved when people asked them to use something else - yes, it was their first time doing E12N, no, no one was giving them a hard time for failing mechanics
but their lack of healing meant that both rdm's ran out of MP to rez people because any modicum of damage meant someone died due to lack of healing
neither of them were sprouts and both had multiple jobs at 80 and at that level and after 5 or 6 wipes, you'd think they'd have picked up 1-2 mechs or at least thought about just following one of the players that executed the mechs, but no
a scholar who had trouble healing matoya single pulls and was complaining about the tank, every healer at 80
a tank single pulling paglthan who stopped tanking when the dps' and I pulled the rest
shinryu, where the two rdm's in the party were hardcasting verraise multiple times, both of them having multiple jobs at 80, attacking the boss and hardcasting it again, with the mentor sch not healing at all and dying to the wave mech, the first timer tank also dying to said mech (no big deal due to first timer) and the second tank not having their stance on, which meant the dps' get deleted one after another - the sprout whm being overwhelmed with the amount of healing they had to do and dying because they didn't heal themselves and instead tried to raise the tank again (nbd again)
and that whole thing almost happened again, with the rdm's hardcasting every long-ass spell for most of the fight until at least one of them figured out how dualcast worked and subsequently sped up the run a LOT, but now the sch helped with the healing
multiple people were begging and trying to help the two healers in e12 and shinryu but it fell on deaf ears or was ignored, the sch and tank in the dungeons were toxic and resistant to advice and got kicked but not before threatening reports
it's not hard to miss an RDM hardcasting or a healer standing around with a thumb in their butt, you don't even need that forbidden tool for that - and I don't understand why you'd bring it up?