Tactics for playing as the Dwarves.

It's unlikely you'll be able to complete it without any losses. You need to recruit Erls, Dragons, and have the Resurrection spell and the Rune of Resurrection, as well as the Rune of Etherealness. You can also use Warriors with Harpooners. It's best to protect the latter. You also need to upgrade Storm Wind. Speed and aggression are key here. I can't offer any more advice; maybe someone else will have something to add.