Quote Originally Posted by Soukyuu View Post
That's exactly the point though. Why does it have to be a set job? Why DRG over MNK (or vice versa?)
most of the time we were looking for either a whm or a blm. we can't really bring a brd in to replace a whm. and a brd can't replace a blm as a ranged DD. the gap in DPS is just too great.

You don't want to bring a DRG/MNK in place of a BLM to great buffalo. because they will get slaughtered by the AoE. You can't bring a WAR tank to a Garuda burn because the war will not be able to generate enough enmity to keep the BLM alive.

MNK is preferable to DRG in a non-burn garuda because they can kill and damage both sisters due to elemental fists.

Every job fills a niche and there's not a lot of cross over. which is actually a very good thing. if every job was interchangeable the game would be too easy and there'd be even less point of someone wanting to say 'I'M A DRAGOON!!!!' because your dragoon is just as good as my BRD.

So TL;DR: because of class uniqueness.