Warlock – “Expansion” [4th campaign, 2nd mission]

I saw your "tears," thanks, it gave me some information. I've been struggling for three in-game days. I tried everything: luring her into the castle with a cool woman and attacking her between stalactites and stalagmites, but she still killed my wizard. Only a couple of hours ago, she finally came to the castle, and left a hundred assassins for me :( I'm sitting here feeling defeated and I don't know whether to be happy or mourn my army friends.