They said they have two system in mind

8player : Which be more of hardcore feel you need to plan out your battle and it be a hard fight. Maybe need two tanks and two healers and strong well DD.

4player: More casual just need a tank,healer and w/e looking. not much of a hard battle pretty easy straight forward need less planing and more doing.

If follow with this system that they said going to be in FFXIV, Then this game would be casual / hardcore for sure. They also said they be high level gear you can get by doing quest that would be chain of quest. so a lot of quest just to get one item but it be a bad ass item