Wizard – “Hope of Zephyr” [Campaign 6, Mission 5]

Biara caused problems for everyone, and then having to play 12 battles practically in a row, all manually, is clearly a developer's nightmare for users, but nevertheless. In principle, I thought that it might have been possible to only deploy level 7 creatures against Kha-Beleth, but this thought came to me after seeing the list of game authors after completing the campaign. Has anyone tried doing this, and if so, is it effective? Otherwise, Holy Word, Banish (for those who have it), and Resurrection are helpful. That's pretty much it.