SE. Please. Ilv sync everything.

[Jojoya]

If you want to play lower level content with your full array of skills, this is already available to you through the unrestricted party option. Your rewards using this option are next to nothing, and for good reason. Because your commencing the duty at a level and/or with a party composition that it not intended for it.

Minimum ilvl, no echo is also available to you through the Duty Finder settings.

Whether we want to acknowledge it or not, players come in different skill levels. Making things difficult for players who already struggle at the current ilvl syncs won't encourage them to get better (which may not be physically possible for some of them). It's more likely to make them quit.