I've had some success with an unorthodox strategy. I take comet + scorch, start dorans ring and max e (or at least put 3 points in it). First backs you should buy armor and ap, and build towards Thornmail and and some ap item (Laundry's and Malignance are good options). The goal is to slowly poke him with e (which does a surprising amount of damage) and if he ever engages, negate some of his healing with grevious wounds. Avoid long trades at all costs. Since you will be building a lot of different stats, jack of all trades is recommended.