Itd be good for DPS to understand their role. I'm a tank and I get annoyed when i do a range attack to pull the mob but a lancer or whoever then goes and fetches his own. I squeezed in some traits from gladiator into my maruader to try and get the most aggro I can and use area attacks to get stray mobs off any healers but all of that still depends on DPS following the lead.