How to effectively use quick battles (autobattles)?

Actually, no. I mean, there are saves. Surely if something similar happened online, someone would notice :)
And in general, it's been suggested for a long time to ban Quick Combat, because people should actually play!

I suggest not conducting further research on the topic of who beats whom and how in quick combat, so as not to create templates by which uber-Dragon Utopia and strong monsters will then be easily taken. Although even now, people are taking clues from the hydra using quick combat, and unfortunately, this is not considered a violation. IMHO, quick combat cannot be banned in versions with chess clock time (TE and Asm's version with simultaneous turns), but in SoD, if necessary, the "quick combat" button could simply be removed, if the heroic community agrees + skilled people are found to do it.