I would like to suggest to fix this types of event where bosses drops multiple items. Because this type of events are favorable for those players who have FAST ISP. It doesn't matter if you're geared up or dealt highest to kill the bosses to get more loots. All you have to do is to acquire/have a fast ISP and you'll win. Maybe try to increase the number of bosses or try to balanced how the looting (speed) works.