The Battlemap of Twisted Towers is a mess.
Yes, I'm still reporting bugs.
I'm trying to have fun with Ogres now, since The Slaanesh Experience™ has been totally ruined by bugs.
Anyway, the city is floating above the ground and the battle takes place down below.
Would have be fun as Skaven (Undercity battle mechanic) but alas it's just Khorne-clobbering by Ogres in a broken game.