Quest issue: Taking Battle To The Enemy

Working through the ATG content, and I've reached the point where I've picked up the quest 'Taking Battle To The Enemy'. However, whenever I head over to Deathspeaker's Watch (next to the Tournament grounds) I seem to be in the wrong phase of the game, as no mobs are available to kill.

Another peculiarity: 2 different quest givers are offering me this same quest - Cellian Daybreak and Zor'be the Bloodletter. Both quests have the same name/description, but separate entries in the quest log. I've tried only have one or the other, but the original problem still occurs with either.

I'm experiencing the same thing. might need to submit a bug report?

Looking at wowhead; this quest was released in patch 3.3. It could be that this hasn’t opened up on Frostmourn yet

Cult of the Damned mobs are all over icecrown, just go to another location like Sindragosa's Fall for example

https://www.wowhead.com/quest=13813/taking-battle-to-the-enemy