[Reikou]

The real question is, what would be the best way to implement something like this ( And how much work would Dev have doing so? ) ?

Maybe individual fights that last up to X turns, and once the turn limit is up any damage done to the boss is transferred to the 'real' body.

Or something crazy like a boss that shares the same HP and status effects across all fights.

I'm not sure how good of an idea it would be to put more than 4 players/1 party in the same battlefield, as waiting for everyone to take their turns would be painful, even more so if someone lags.

But I can say one thing for sure, a system to prevent people from freely leaving the area to Remedia somewhere would need to be put in place, perhaps in the form of a hit to their rewards.