Start with a Elixir of Fortitude and some health pots,

Then when you back you need to rush "The Brutalizer" and transform it into "The Black Cleaver", after that you want to build either "The Bloodthirster" or "Ravenous Hydra", depends on what you like.
And get abit tanky either with some armor such as, "Randuin's Omen" or "Spirit Visage", depends on what you are against and 1 of the most important items is "Last Whisper" and a "Guardian Angel" and boots you need to pick up "Ionian Boots of Lucidity"