How are you getting Dungeon alert? Unless someone falls and they have to go through Red/Green light or the Bone Guardian fight room, you should have max green alert in the end fight.
Are you talking about Slow from the Kuldjs? If you are kiting the Kuldjargs on Normal or Hard, kite them close to the edge on the west side. There is a small wall there, you can just jump in and out of the main platform, making it kinda easier. I don't really recommend kiting them in the main platform all the time on EN or EH, that slow is really annoying.