"Job XXX only" parties

[Sephrick]

I haven't seen this yet. And I'm not sure what class would be considered better than others in Ifrit like in Darkhold.

Are you sure it's just not a result of needing a balanced party for once? DDs tend to be the first spot to fill so people need to shout for tanks and healers.

[MeowMeow]

Simple solution: Everybody level a mage job. No matter what fight, you will ALWAYS need healers... so if you have one leveled, voila. You avoid the inability to join said parties.

if you DON'T want to level the job other people want you to be, then don't expect to do the content with them. Either make your own group, find a group who will take you, or whatever... But in the end, people would rather have the highest chance of winning... and there is almost always a certain setup that gives you an edge of winning any fight.