I don't know what's so scary about it. My Markel completed it very quickly – he dealt with raising the dead and summoning a phoenix (phoenixes are powerful!) with almost no losses when fighting the angels, and then he used the undead converter – and that was it! Godric doesn't pose any problems! The main thing is to build up the human castle properly and not lose Isabelle's troops when they run away. I achieved this by sending her army to a castle (you can also send it to another hero) – they don't run away from there. And then I gave them to Markel to raise some undead. There aren't many of them, but they are still useful at the beginning.