I Need Help with Progressing in the Cantha/Factions Campaign

Okay so i have recently been trying really hard to get farther into this campaign and have had no problem doing so untill now. Im at "Altrumm Ruins" and "Zos Shivros Channel". These are both challenge missions, and from what i have heard from people do not bring you to a new area. Could someone please tell me how to further myself in the campaign. ty.

I got stuck by not doing the battle in the sewers/under the city quests. You need to get it from Emperors hand in Kaineng Ctr. That will open up the rest of the game.