Eliminate the guardians of the capitals.

I decided to play Disciples to reminisce; I missed my favorite Legions. After a campaign, I had a 14th-level Archdevil; now, he's level 19, and that's not the limit. Anyway, just out of boredom, I just took down two enemy capitals. The situation with potions and elixirs was very, very bad, so I went a different route – I spent days in the training camp, leveling up an Incubus to an absurd degree, so that he could survive one attack from a Guardian even without potions. At the same time, I had a purple Demon from the Abyss in my army. The aforementioned Archdevil hero and a couple of Hell Knights joined them, but they were mainly a support group. The battle was easy but terribly boring. The entire team survived the first attack; then, the hero took out the opponent's support group with one Fireball, and then, over many rounds, the petrified Guardian was methodically torn apart for souvenirs. I think two purple Demons would have handled the enemy much more effectively with the same success, but the Incubus has a better chance of petrification, so he provided excellent support to the purple one. With only one petrifier (any), there was nothing I could do – one wrong move, and that's it. But Kosh is smart; Kosh destroyed two capitals and leveled up the hero ^_^