A party wide parser only in ex trials and savage raids sounds good to me. But make sure it contains not only dps parse but also number of dispels, healing per second, overhealing %, damage taken per second, number of revives, number of deaths, healing taken from different sources, damage taken from different sources, buff uptime, total healing, total damage done and total damage taken. Like Recount or Skada in WoW does. So when that healer with 0 dispels, three times the damage taken from aoe and one death tells you to git gud, you can point out they have some things to improve as well.