In the spirit of zer83's Bloodletter spawn, here are mine about the Dominator.
The spawn pattern is slightly different for when the Dominator appeared for me.
The normal spawn will be 3 spiders, a set of 2 imps, 2 spiders then 2 birds.
When Dominator spawned the monster spawn order was 3 spiders, 2 spiders then 2 birds. You might even be able to see the Dominator as you are crossing the bridge, I think I saw it but I was in timeshift dodging the vulture at the bridge.
Hope this helps many of those looking for this elusive bird.
What I noticed was... at one point there are a couple of imps... well they weren't there on my one run, and as I crossed the bridge (Where the two birds are), I could see him. --- XBL Gamertag Andii Vamp PSN ID andii_vamp
Well... I've well past the 100 attempts mark. Hell I've found the Jade Golem 17 times (captured 11)
I'm aware the Jade golem is just past the intersection to where Dominator is. but Jades easier to tell if hes up as there will be no imps or hypnos along the way.
What irks me is when you enter the area to begin with the area that dominator is in is actually visible from the enterance, I wish you could see him from there :( --- The only thing worse then a fanboy is a Halo fanboy.