Stage 5 of the John Van Caneghem Tournament

I tried to follow wolf64's walkthrough for the Nightstalker campaign. On day 2, I didn't have enough movement points to collect the gold sacks, and I'm not very good at playing with small armies, so the gargoyles defeated me. On day 3, the same thing happened. Can anyone recommend a good tutorial for playing with 5 heroes, where I can learn how to fight effectively?