I have found the combination of Boneshard and Ikky have been really good for most of these fights. I also have a second level 25 Ikky just in case. Boneshard: Blistering Cold, Bonestorm, Chop till Boneshard dies. Ikky: Black Claw, Flock.
I know that kids these days are all about the Ikky, (GET OFF MY LAWN!! :P) but I still rely on my trusty squirrels - Blighted and Infected - and it's nice to see one in the limelight again. Took a nasty crit and still got the job done. Perfect.