You really don't need that stuff. Your melee combos do way enough damage to finish the opponents off. However, I do build lich bane after the core tank build is done. Also, ironically, as tankko, I do the most dmg because your cc makes it so you can be right in their face for a long time, so it is really easy in the early game to do dmg. I recommend you go iceborn sunfire spirit r do spirit early if you have an ap enemy laner. Then, build lich bane. In team fights, your basic ad does way more than enough, so don't bother with more than lich bane.