The tank most times will put 1 on the monster to hit and kill first 2 3 ect ppl do this so the tanks and healers job stays fair. With out them some not all party members go bat crap crazy and hit everything that moves this makes the tanks job hard since he now has to pull the monsters back on him same for the healer now they must go out of there way to wast more mp healing ppl as for party chat if your party is not talking then say something idk?