I realize this isn't news to some people, but for those who don't already know (and i know many don't because i'm constantly telling my raid groups about this), running the lamp section with icebreaker is a HUGE help. You can turn around and no scope/quick scope into the crowd of thrall and it will destroy most if not all of them, not to mention you get the +2 Agility. Give it a try.
Edit:
MIDA sounds like another great weapon to use for this. Unfortunately though, i do not have that gun. So i can't try it out. :(
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If you're running as a team Ice Breaker is best. If your team keeps dying MIDA will keep you personally alive way better. Your best bet is a level 32 Hunter running bladedancer with all the invis perks using MIDA and Don't Touch Me gauntlets. It won't matter if everyone else dies because such a hunter should be able to solo even the hard lamps easily.