Ok after camping this spawn for some time here is the info.
Goonda spawns every time in the same place and summons the pet on the second spell pretty much every time. There are 2 shaman spawns who will be either shaman or priestess... one is right next to goonda and the other is on the back side of the pillar in the middle. Beyond that there is 1 guard in front of each tombstone looking thing, 5 total I believe. I believe the guards agro no matter what lvl you are but will not agro eachother. So if you are just in the range or one guard's agro only he will come after you (if you are high enough) but the shamans may come and help if you are not high enough.