I created my first static as a mean for my FC to have a group running evening EST. We progressed to turn 4 but never could beat turn 5 cause of lack of time/interest/skill so I went ahead and beat turn 5. Then I made a second Coil static with random players I met during a Party Finder for turn 6, had to replace 2 healers and 1 tank but after that, it was stable. Now we're on turn 9.
Of course I still go back to help my FC with previous coil but I feel it will be a while before they start downing turn 6+ because these new turns might be a bit too hardcore for some.