Heroes of might and magic 1 part 10

In this part I restarted this mission once again. At first I thought that maybe I could get a ship and attack my enemies quickly. But when I changed my plans. In my previous attempts I noticed that quite a few neutral monsters are willing to join my army. So this time I spend a lot of time gathering those neutral troops. Some of them didn't want to join and chose to fight against me. Those times I relouded my autosave because I thought that maybe they will join me once I will have a bigger army. So far my strategy worked well- a lot of archers and some other units joined me and by the end of the video I have quite strong army. But the problem remains- map is large and with a lot of towns so I am not sure if I will succeed defending my territories and attacking at the same time. Also it seems that now I only have one enemy remaining and he controls all the territory that is not mine. So I have to attack soon or else it might be too late...