The problem with the PG is, that the challenge waves are not always the same. They start out at the same location, but you don't get any control of the party or DPS or tank, and the mobs need to be moved around at times. I haven't seen the WoD version yet, but it has to be near worthless to script combat options. If it resembles the MoP version even remotely, it's a once off event. You'll never need to go back unless you change spec to tank or heal.
In some ways it is similar to the kanrehad ebonlocke warlock green fire event, but, there's 34 classes that need profiles to run past particular damage areas, kill certain mobs first, AoE while positioning, and saving cooldown for the more important waves ahead, including health cooldowns.
A quest profile and a damage avoid QB could be used, but it's unreliable to expect a good response.
Tuanha rogue should be a good start, but it will require experience of the class to know what will work out. Every CR is capable, unless it is PvP restricted.