Would the folding fortress be good for a slann. He could take it and have 3 disciplines and bunker himself in it and the disciplines are basically magic items so he doesn't need other items. is it good?
It would make the Slann static, so you'd want to choose a lore with lots of long range/damage spells. Also if the rest of the army were going to go on the offense you'd probably want a scar-vet as BSB. It would be a very different list design concept, I don't know if it would be effective.