you started the zerg rush when your bosses kill people out right with out a chance to dodge or the aggro table jumps from person to person. Also when you have 20 some mobs with three elites that are some times as hard as the bosses. That is why you have people using exploits to get past large areas. I love a challenge as much as the next guy but all it seems to be in dungeons is a zerg rush to get through or hope some one can kite the boss around till they get back. you should switch phase 1 and 2 around. All your doing by starting with phase 1 first is making the dungeon last longer because everyone has to run back. You should look at the boss and encounters first because that could solve all your problems and in doing so would stop the zerg runs in the first place. Taking away the res then work on mobs is like putting two band aids on the same wound. if you take care of the encounters first then see if the way point change is needed would save you a lot of time.