Unfortunately OP is "partly" correct. Normal mode fights are purely a healer check, everyone else can be a complete clown and it doesn't matter, power-heal through stupidity, rezz what can't be healed. As long as the healer stays up then its all good. Sadly the solution isn't using a stick, people who stand in 3 mechanic don't care enough to not stand in 3 mechanics regardless of the punishment. I don't have an easy solution but maybe some carrot might work better (though I'm not sure people care about carrot either). Maybe a massive xp/gil/tome bonus based on % of damage done from the DPSes.