I was thinking more along the lines of, let's say, how you can enter dungeons undersized. Except you could go from solo to max amount of party members and even form some sort of alliance or whatever with another party to tackle it together, but it's not required to be a certain size. It would be done for end game content rather than old game content. Imagine a hunt that is party restricted because you have the wanted poster - other parties can't attack it but you can and you can either form a party or decide to go after it solo. It would be designed for eight max but can be done from 1 to 8. Open world so no ring lines. That kind of thing which I understand is different.