Welcome to Librarium Online!
Im having trouble figuring out how to beat a dwarf force... the only thing i could think of is Wulfric the Wanderer and a unit of marauders that would pop up and engage the armies shooting units, allowing my cavalry and dragon ogres time to get across the board and tie up his main units in combat without being torn to shreds on the way. The cavalry would (hopefully) stay in combat long enough for reinforcements of chaos warriors and more marauders to get across the board. I need more ideas! Please reply with other good strategies!