I guess pulling size comes down to wisdom and looking at gear before doing it without saying anything. In Quarn its dicey when you pull 2 bees and your DPS can't burn them down... but then we have a stun now so that comes down to the tank stunning (if you need to). Its also important to note the party gear, mainly if any are undergeared substantially or not. I always look at everyone's gear before I start pulling. If the healer is undergeared than no way am I pulling massive, ill pull medium and DPS is kinda the same if both are not at a decent gear score because the adds wouldn't die fast enough for my cooldowns to keep me alive.