Raptor farming - Messed up?

So, I've been farming raptors in HM and normally I do just fine, but I've not done it about a week or two and now I can't complete a run for the life of me. I'm an E/Me and pretty much use this build since it worked alright:

http://pvx.wikia.com/wiki/Build:E/Me..._Raptor_Farmer

but now the raptors just scatter and I'm lucky to even kill one. Has something been changed or nerfed or whatever? Has anyone else done this or had this problem?


EDIT: Oh, just noticed the note above the build about the nerf to silver armor. Dang it! Oh well..

Yes pretty much the best (only good?) way to farm raptors now is with a W/N.

They didn't change AI behaviour.
Sliver armor got fixed to his expected functionnality (random target for each hit).

Damage get spread, they all get some damage on time in a small area, so they scatter.
Try degen by Radiation Field or Taint, it is probably the same kind of scattering.