Before i continue i'd like to say that in time once i really get into the other classes ill edit this to include them.
Now in the moments that i have done dungeons. I have come across tanks that don't seem to know that all classes are not the same.What i mean by this is... Despite the fact that knowing how to play your job is important each job has its own individuality, such as Summoner and Blackmage
Summoner despite being DPS Specializes on DoT(damage over time) half of it comes from the Egi.. Summoners useful in drawn out fights and enemies that use cure (miasma lowers how much someone can cure themselves for). Bosses like the first boss in quarn that can kill pets easily pretty much kills damage potentials... expecting a summoner to ruin spam the bees is just not gonna work. Either pray you at least get one other dps (THM, MNK, DRG ,brd[?]) or as a tank throw some dps... its not as if any dps will still attack the main boss you don't need to keep attacking it. (I know some people would say well it's the dps fault, i'm the tank its not my job... but i think your at fault too if you can do something and you don't do it simply because?)
Scholars Are the healers they may not be capable of pure healing as a whm but they have their uses. for instance Adloquium may not be able to cure big like cure 2 but it adds a magical barrier equal to the amount healed... this means that although it only healed for 235 hp the tank essentially gets 470 hp to play with. its also useful for overzealous healers since its kinda like giving people extra hp especially if you can crit heal. Now at low lvls at Brayfax Longstop we all know the final boss has a KILLER potent poison that can tear through tanks like a nuclear missile would tear through a paper mache ball. If your unlucky enough to get a scholar in your party a simple solution to them not having Esuna is to simply carry Antidotes... Please if your a tank and especially if your doing something you've already done before if you need an antidote please bring some
I carry echo herbs with me (even tho silence doesn't last that long) because you never know.
Work with the party you HAVE to make the run successful. A sign of a good player is to adapt to the situation at hand, not scream at someone because they can't do something their job isn't built for. There maybe a tank shortage ATM but don't be arrogant you definitely arn't that good if you can't work around a healer not having Esuna when the game provides various ways to make up any shortcomings that are obviously foreseeable.