Valley of the Marauders

Could you provide more details? How can I help the Druids? As I understand it, the nearest grove of Ents isn't relevant. But if the Ents are needed in another valley, how will the Druids understand that the hero intends to help them and will they help during the assault? By the way, the beginning is tough. I watched Remix's stream, and it seems that you can indeed wander around there. I haven't watched it for long, just in snippets, but in the stream, there's 1 Archangel in the city, while I have 3 of all types. There are almost no buildings in the city for my hero (this is with very limited resources), but in the stream, it's like you can just move in and live there. And so on... I was lucky to find a way to deal with the Warlock relatively early on – he mainly focused on raising the dead.