I just got to him yesterday (again)
[click for large one]
I forgot to save the end screen, but it's no loss, althou I was lucky to find necromancers set together with set of darkness, and this is crossroads and I got that artefact from "mistycal tower" set to give me 2000 LS so this high number of BKs is just insane for a mage lol
BUT, even if I had ~150 of them, result would be the same, 250 just makes it faster win.
in Second turn I casted magic spring and infernal flame on BKs. Besides that, I had 50 intelect, onslaught 1, that undead commander on 3 and it was night. I think my defense was ~10 and attack ~15, I could post a screen of a hero if it helps. I also jad +15% physical resistance boots. I think BKs had ~75 attack and ~110 defense in second round with stoneskin and magic spring, physical resistance was at max, 95% I think (15% boots, 45% stoneskin, and I think gloves of destroyer or some other item gave +10% to allresistances, can't recall atm.)
anyway, BKs are just way too easy to play with. Even heroes that cast displel on them are not that much of a problem if you just "wait" or save your second spell cast to stoneskin them again, or phantom them.
I am going to try and go with just demons the next time. They may not have rising furry, but they always retaliate by default and I can have some demon set instead of wasting two slots on helmet and shard, I could have 7-8 inteligence instead, or more defense or leadership, who knows
Also you can cast ress and divine armor on demons
