So I wanted to post this here because I have a suspicion that this is going to come up for me.... probably fairly often because where there are ruins, people like to put models on there, both because it provides defense against assault if there is no place to put the attackers, but also improves your armor save, and gives you better line of sight. win, win, win.
So the reason models cannot assault up onto that second floor is because per the
FAQ they cannot be placed up there, and their base is more than 1 inch away from the enemy's base... assault fails, and they run around looking silly below them.
But now we take the Defiler or Soul Grinder. 2 massive models made by Games Workshop, released in a time before many of the larger walker and flier bases were released, who do not come with bases in their kit. These models are very tall, and as I understand it, all distances are measured from their "hull" including for purposes of assaulting. As such, If a unit is on the ramparts of a 2 story ruin or something, and the Defiler can get any part of his hull within 1 inch of that enemy unit... its a valid assault.
It seems like a loop hole due to basically any monster with a base being prevented from accessing this assault because they cannot get their base within 1 inch... but the giant crabs are measuring from the hull like a Tank...
I just want to make sure I'm reading this correctly, because I'll probably get some looks assaulting a unit on a ruin my opponent thought was safe by putting a crab claw within one inch and measuring from there