Walkthroughs for custom maps.

The prayer will only work later, due to the delay, during the first turn of your unit.
Another important point: if you have Wizards and Rangers in your army, you should always place the Wizards to the left of the Rangers, as they cast spells on the entire unit during their turn, and the Rangers can already be buffed during their turn.
I can't immediately figure out how to defeat DarkLord. I need to try different spells and tactics...

After taking the Titans from Gandalf and regrouping the troops again, I almost succeeded. Maybe the next attempt will be successful. I think I was doing the right thing, but I needed to move the Archangels away from the attack in time, and I didn't do that, and they suddenly died. And then everything went wrong.
Finally, after another attempt, when the winning tactic became clear, I managed to defeat DarkLord. If his air elementals had been blinded or if I had managed to keep them at a distance, I would have resurrected everyone, but as it is, the losses are: 1 Archangel (who defended the gate at the beginning of the battle) and 6 Rangers. As usual, the Archangel clone is the key to success, but you can't let the enemy kill the Archangels themselves.