Final campaign - "Too Bright for Darkness [Campaign 7 - Mission 2]"

I also recently completed this mission with Irina. I got the achievement for Kate by building the "Duel Master's Pagoda" and using the "General Haste" spell in battle. Thanks to these tricks and the support of the Kirin, all my troops safely reached Kate on the first turn, and she didn't even use her "napalm" attack.