Start of by last hitting minions with attack and Q until you can afford Hextech Revolver. After that farming and FB will become a joke. Haunting Guise is very underrated in this game, but when tanks realize that you are taking a **** load of their health by level 10 die to the fact you have 50 MP and their MR is close to 0. Causing the tanks to become useless, easy 4v5.

Once you get to Abyssal, sell the Guise to replace it.

And that's only tanks, wait until you see how much your Q deals before you even aim for Rabbadon. Once you get Rabbadon its a gg. from there farm and kill till you can get the remaining items to make you have 4K health and 762 AP by end game.

I can't teach you how to play as Vlad, this is simple me sharing my build with other Vlad players. Test it for yourself and let me know what you think.