So this past weekend my guild finally downed her. We had a Tankadin as MT and my DK (frost spec) OT. I dropped DnD just like I had seen done in 25man and of course we los the cats. We had tanks grab aggro and all melee/caster dps waited 5 secs just like patchwerk. We didn't split the cats up. Healers were pro so we burned down the cats. The MT died couple seconds after the guardian died the first time. We moved away from the void zone. There is isn't a reason to really los the guardian cause he still pounces as of this past weekend no matter where u position ur raid los or not. As I was tanking boss, soon as I seen the guardian pop up, I would taunt/death grip to get his attention and beat on him, pestilence to keep aggro on boss, HB, BB and burn him. Since I was targeting the defender (target of target) if he wasn't hitting me it was easy to grab his attention. After he died the 3rd time, boss wasn't almost dead to aoe dmg. So if your MT dies and the OT is tanking everything I would recommend the OT (when the guardian is up) focus on it only and use aoe dmg to keep aggro on boss. This imo saved my raid from dying from him. For the little adds that do spawn ensure u have an aoe attack of some sort ready. For dk's DnD, BB is sufficient. For frost dk's ensure HB is ready and if KM is up little adds die very quickly.
I noticed one thing lacking in these boss strats is the group makeup or class specific details. It's always nice to learn that the hard way but it's maybe something tankspot could look into providing?
Our group consisted of:
Frost dk (me)- OT