Quote Originally Posted by Jeeqbit View Post
[Duty Complete] = for people who already beat it (the implication is you should be consistent at it, otherwise should join [Duty Completion] or [Practice] instead)

[Duty Completion] = seen all the mechs, consistent enough at them, ready to clear in a few pulls (rarely, a few players put this when it's fresh prog because they are wildly overconfident, probably new to high-end duties)

[Practice] phase # = join only if you're consistent up to that mech (but obviously many aren't consistent or party leaders themselves aren't)

[Practice] fresh prog = can be totally new to the fight
If the duty is set to duty complete, you are unable to join unless you have cleared the fight. Everything else is different levels of practice.