Here's a better shot of Grobb. This is our first attempt at killing him. If I remember correctly, I was there for the first attempt, but then I got subbed out. I think they wiped 2 or 3 more times before they killed him. That was probably less than an hour after our first Patchwerk kill. So yea, Grobb is an easy fight if you know what to do.

And yes, that's yet ANOTHER boss kill that I missed. :)