This is why I created my own linkshell so I can experiments with my ls members. My linkshell has good fun people in it that are willing to try new things and while still having fun in-game.

*Just my opinion, but as an MMO there's a reason why there are more than just one job to level, and to include the fact that veteran's usually stick with only one strategy, which, in my humble opinion find it really stale quickly. It's only great to use the same old' strategy that works effectively if it's within a static party, or to help each other get an item (exampe: totem or garuda weapon...).

In the end, MMO is a game of diversity and that includes variety of jobs and how any party leader who assemble a party for CC or AV wants it the way he/she prefer.

So yes, its a requirement to have an 2nd main job such as BLM, BARD, WAR for certain speed runs or quest.

That is the reason after leveling my first job to 50 (MNK) I got my BLM to to 50 within 5 days and rarely used MNK and I am okay with that because I enjoy getting invites and such. Which leads to a strong YES! You have to have a 2nd job that fit in with the community if you want to succeed in moving further into end game and get items =)