I tried multiple factions in very hard. Excepting with Grimgor, I finished by losing with others (Morghur, Tzeench, Ogres Cannibales). I don't critisize bcs I like the difficulty, however I lose for only one reason : The thread becomes red rapidly and every faction attacks me and send armies far from their lands.
How to make this threat from red to yellow and yellow to green ? Do I need to wait before taking new cities ?