Songs of Conquest - Barya 1 (overwhelming) in 21 rounds
Barya 1: The Payment of Debts on overwhelming difficulty
Aleah's battle is a challenging beginning. It took me about 40min before I finally got past that battle. But on that one I got the best result so far. General strategy to get past Aleah: merge Tinkers, split Steam Pipers to get enough essence for Justice to take out the cannon. Starting positions matter also a lot since you don't want your Tinkers & Spearmen to get hit by the cannon.
Afterwards I do a couple of optional fights to get any kind of resources for the following fights (Dreath Den, prisoners).
Most roadblock fights are not mentionable, they can be done with very low losses. Only one to mention is the Nimander battle. There you have to take care of whatever spells he's going to cast. So protect what you need for later.
It is crucial to avoid Ravenfayre. You can see them shortly see them in the video at ~52:05. Tavern & Waterfall help outrun of course and I stock up my mercenaries here before the final 2 battles.
The last battle "Undead Warriors" is very challenging, that's why it took me an hour to figure out. In an earlier playthrough (on overwhelming) I got a favorable battlefield for me. But well, I didn't record that.
some highlights:
1:35 battle vs Aleah (1st try and my best outcome ever!)
32:30 battle vs Nimander (2nd try)
52:45 "Ghosts of the Empire" battle (I created a save here that I have to load a couple of times until I get it right.)
1:47:10 much better "Ghosts of the Empire" battle
1:54:00 I finally figured out "Undead Warriors" battle (delaying the Oathbound by splitting the Tinker-stack)
If you're interested in the game, you find some information at https://www.songsofconquest.com/