Walkthrough tips, Discussion of Campaigns [Heroes 5]

Well, I finally got around to playing the campaigns! I really enjoyed the campaign for the demons. I started playing the human campaign yesterday as well. I took my time and finished it in one day. As always, I played on my favorite difficulty level – hard. On this level, all the campaigns (except for the first three missions for humans) can be completed in a minimum of two attempts, and a maximum of three. The extended playtime on the scenario maps has been beneficial.
P.S. I haven't been on the forum for a while due to internet problems.