I mean yeah of course personal skill and strategy are important, but if you ended up with a full melee dps group, what you gonna do? Not hit the WAR? Use weak ranged attack (if you have any)? The WAR can easily stay inside the crystal to push it, and when you attack them, they will stun you. Yes, if WAR is alone, it won't bother too much, but the problem is there are 4 more people too, who can stunlock you.