Improve targeting

[ChintzyGnat]

When fighting a boss with other people who are insane I find it annoying attacking and instead of attacking the boss (for example well go with fuelweaver) I attack everyone else's shadows which not only makes me fight it but aggros other shadows on me whether I'm insane or not. I suggest making bosses having a higher priority or some other solution. Another targeting issue I find is freezing larvae with a ice staff. After attacking one and freezing it, trying to attack a different one doesn't happen and you attack the same one that is already frozen.