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I was going to take a 1500 pts Empire army against one of my friends to show him how the Empire doesn't have to be crap. He started out as Empire, but wants to change to a mortal Khorne Chaos Army. I had planned to take no helblaster, a unit of Flagellants, a unit of knights (not white wolf) and a unit of Greatswords. I also wanted to use battle wizards. I was looking for advice on how i can structure my army and tactics from those better at the Empire than i, if my opponent takes only mortal units (just warriors, knights and warhounds, not marauders), no daemon or beast units and gives them all the mark of khorne to everything he can.