We have it for dungeons. It's called Duty Support (plus you can unsync old dungeons or solo them synced with a Blue Mage).

I do think it could work to practice a duty yourself to learn it (without all the trap parties), then join farm parties when confident. In fact, this is possible with Unreal where you can unsync the original version to practice it. It's also possible using the sim for specific phases, which is extremely effective at fast-tracking you to having a phase on farm.

But it's a fantasy when they can just barely add support for dungeons and say that trials are very difficult to do (they have added 3, but they don't seem to think it is something they can do regularly).