Tactics in BATTLES

Unfortunately, I can't upload the save because the battle was a own long time ago—Campaign 3 for Chaos: the fight with Dirael (I think that's what your sworn enemy was called) takes place in the elves' castle (the main one). Back then, I hadn't yet realized that you could play as the forces of the elves rather than Inferno, but I played as the latter... the enemy's forces exceeded mine by 2.5-3 times for sure; the battles were deadly.... the enemy had 3 unicorns left, then 1 dragon, then a dozen fairies.... I was planning to drop this campaign for a while and thought: "Let me fight one last time; if I lose, I'll give up on everything...".. but in contradiction to my pessimism, there happened... specifically HAPPENED... a VICTORY!!!! I was left with 1 demoness, then everyone was killed.... I kept cloning them and raising them from the dead.... and I won...)) and once in this same battle, I raised all the corpses... and won.. but my joy was short-lived, because I was raising units that had already died... and own at the end of the battle, all enemy units and mine died((( it was very frustrating..