I've been trying this Freeport quest for awhile now, and can't get past the first group of mobs. The first group I can body pull and it's three heroic 50 mobs. The second group though can't be body pulled without aggroing the next several groups along with them. I get four groups of three heroic 50 mobs which simply can't be done (at least not by me). Am I doing something wrong or is aggro broken in this zone?