Combat so far lacks synergy and cooperation.
Each class do their own thing with little overlapping (and lets not get started about overlapping roles - Healers adding to DPS - DPS off tanking)
Its all everyone for themselves.
Yeah, I'm sure a party with a total lack of communication and coordination, each trying to take the boss solo...works like a charm. It's NOT AT ALL like everyone has a role, a function, a pattern to execute per boss or dungeon, right?

I will Shadow Flare the slime in WP, unless a Summoner does it. Then I'll run in the middle and Miasma 2 the adds. I'll keep the tank topped off with Adlo, remove debuffs and stay at least 10 yalms from the boss unless he goes after me or someone close to me (where I'll go further away). I'll try to heal the chased person unless it's me.

But hey its interchangeable with what the tank does, right?