Warhammer 40k: The Cave

I was given the role of Level lead, which in this case means that it's my team's role to come up with the various battle scenarios that we'll be testing.  My first idea was play with the terrain of a map, what could I do in a level that hasn't been done before.  I added 3 rock columns that couldn't be fired over, but they could be toppled.  If destroyed, they could fall and flatten an entire unit, if the scatter die was lucky.  Below is the map for the cave.