Orsik actually can't charge from C2, since you have to move at least 2 squares on a charge. Nothing to stop him from stopping his move at C3 and then charging to D1, though, so nothing changes. He provoke an OA from zom3 on his way: 1d20=9+? = hit vs AC 20, Damage 1d8+5=12, reduced to 4 by DR...