Not asking to gimp this quest at all, especially titan, but I really feel like being locked to the job you're trying to complete a relic for should be removed(excluding the beastmen/hydra parts). Aside from it totally going against the armoury system, it's incredibly annoying for small ls's, like mine, to complete the titan fight while our members are locked on the jobs we're trying to complete the relic for.
For instance, right now we have 3 blms, a pld, drg and a smn all on the titan phase for the relic quest. Zero healers and the fight is basically a dodge/heal check. Now I don't like healing, I'm not even good at it, but I'd hop on whm for that fight and learn it if it would actually complete the quest for me. I know the other blm who's a sch would do the same. And by doing this we'd be able to stay in the same group and progress as a ls. But because we can't do this, we're stuck on this fight DF'ing relic whm's in AF and 2900 hp sch's and wiping after the heart phase.
Why not clear on whm for the group, then have them return the favor for my relic you ask? Because you'd need to gear their whm's first, then have them learn the fight on whm and finally clear it. That'd take an extra two weeks or more most likely.
Again, not asking for a nerf to the quest, just to open it up to more job options. Not only would this help friends complete the content together (instead of being job locked) but it would also make the content more fun because you could run as different rolls instead of the same one the entire quest line.