misaki_nakahara
So, the campaign "All or Nothing" ("All or Nothing").
I also struggled with this campaign for a long time. I even came here to find hints. There were only 2 posts on this topic. Both were useful, but I did it my own way and surprisingly it turned out easy and fast. And most importantly, capture the castle in the top left as quickly as possible and loot gold. Also add artifacts for gold and the gold skill to the collection. The second important aspect is to run around the map and find good units to join, and these don't necessarily have to be angels, just any good ones. I did it like this: I immediately ran to the town and bought Crusaders there, skipping all the chests, since movement points are needed to buy Green Dragons from the external dwelling on the first day. Then, just clear the map in the nearest area, level up, accumulate gold, and be sure to buy a dragon every week. Then, optionally, pick up the angel at the Conservatory if it's small, otherwise you'd need too many dragons and too much time. After accumulating enough gold, buy Griffins in the town and rush to the village, kill the barbarian who sails to you (for this you need to run through the village in a certain way and stand on a specific tile). Jump into the whirlpool on his ship and capture his castle. Then return to the town, spend all the gold on Griffins (since they are the fastest, which is very important) and roam the map, recruiting good units, occasionally buying Green Dragons because they are useful for their speed. Once you've gathered a good army and accumulated money, run back to the town for more Griffins and head straight to clear the forest of undead. There will be 3 Black Knights there, one of which will be very large; take him out first, then the other two. If the army is too small, buy more Griffins in the town, don't forget to use the teleport — there is an object in the town and the village that teleports you. Kill Ghost Dragons, Liches, Vampires, etc. After clearing the forest and such, run to the shore located at the top right; a regular road leads there, and you need to trigger a script that a crossing is required. Give the daughter to the Forester and visit him again — he will build you a crossing. And there will be a road with a sign about exiting the map. That's it, victory.
I myself won this scenario quite quickly with this approach. My army consisted of 500 Griffins, 100 regular Griffins, 80 Monks, 40 Unicorns, 5 Green Dragons. With roughly this army, I cleared the forest quite quickly and easily, as the units there hadn't had time to grow. The toughest stack was 150 or 200 Dark Champions, but even they fell to such an army.
I also want to add something about the last scenario from the "All or Nothing" campaign. I was progressing smoothly through the stages, reached the Diamond Dragon, got the pass from the Dwarf, was let through by the Arctic Snipers, gave the sword to the Mage, and all the undead died. I ran into the castle, got the army, and killed the Blood Dragons with magic to kill the undead. After revisiting the castle, I received a message that I needed to kill 2 heroes, but the map was already completely cleared. I clicked on various objects and tiles, but nothing teleported me anywhere, nothing happened. So I used a cheat to reveal the entire map, and the 2 heroes were in the underground surrounded by Devils. Apparently, the script malfunctioned or the map was unfinished. Using Cheat Engine and ChatGPT, I changed memory cells so that the hero ended up in the Dungeon, then used the numpad keys to make the first moves and revealed that area of the map. I killed the 2 heroes and the scenario successfully completed.