I am an O&G player and enjoy running my army. I have a friend who's main army is dwarves. Whenever we play he uses the turtle shell technique employing a bunch of cannons, boltthrowers and thunderers to back his rock hard Iron Breakers. I have played him 3-4 times and never beaten him but in a small 750 engagement. Any time we get to around tourny sized lists he just has way too much ranged. He just cannons my warmachienes and uses his bolt throwers with runes of strength (str7) to demolish my chariots and then pummels me down on the march with thunderers till I either break or am to weak to to win combats... Also when I do get close he has his units close to protect flanks so I cant break his ranks. What should I be doing/using to combat this list?