Worshipper – “Conquest” [Campaign 2, Mission 3]

Alright, everyone, I just finished this mission. It's worth noting that I completed it on the first try, even though I've been playing for 22 months. To be fair, I did play it about 4 years ago, but back then I was just starting to play Heroes 5 and didn't know much.
Thanks for the advice; some of it helped.