Solo-ing or duo-ing duties as in, attempting to clear synced content with only one or two people. This is completely fine in pre-negotiated groups and while playing solo, but in settings such as Duty Finder this is very disruptive and frustrating to have to deal with. This is largely done by players on tank jobs as the increased bulk of tanks and their defensive and regenerative skills and abilities allow them to survive most damage on their own in normal level content.

This type of behavior really prevents the rest of the party from participating in the duty and actually playing the game in the event the rest of the party is dead, as they can only watch as the tanks do the duty by themselves instead of just starting over and allowing everyone another chance to do the duty. I have seen situations where this has happened while other party members explicitly requested to restart the duty so they can actually participate but were ignored, including situations where newcomers were present and were thus prevented from actually playing through the duty.

I'm not sure exactly what could be implemented to best prevent this, but perhaps things such as, allowing vote dismissals or the ability to leave the duty while engaged with enemies, or fight design that could prevent tanks soloing in the presence of a light/full party.

Thanks for reading.