Buy Doran's blade and go to the top lane and don't fight with your enemy sometimes you should harras but dont fight too much you need farm because your items are expensive (Hydra,mallet etc...) If you have a chance to go base when you have enough money to buy your boots go to your base and buy your boots after you go back to your line continue farming and harrasing your enemy sometimes now you need to phage when you have 475 gold and have a chance to go your base go to your base and buy a ruby crystal first go back to your line and farm for buy a phage when you have a chance to go your base go and buy your phage.

You have a Doran's blade,Berserker's Greaves and phage now you can play a little agressive never miss the chances for doing your W,E,Q combo to your enemy because it is Pantheon's basic combo and it is the easiest way to defeat your enemy when you killed your enemy go to the base and start buying infinity edge first buy Pickaxe and then a BF sword finally buy cloak and finish your infinity edge after you bought your infinity edge you are ready for big fights ! don't fear attacking your enemy you are strong enough after having 2-3 kills and farms go and buy a vampiric scepter because life steal is an essential for an AD offtank have some kills and farm again and finish tiamat then ravenous hydra now you are a monster nobody can stop you

You became a monster at mid game in late game you have to finish your build you are an AD offtank and you must be active at teamfights so you need a good deffensive item buy a guardian angel it makes you a nightmare for your enemies.After having your guardian angel if you have time upgrade your phage to a frozen mallet and sell your doran's blade after selling your dorans blade buy a black cleaver and enchant your boots alacrity NOW YOU ARE UNSTOPPABLE AND READY FOR FINISH THE GAME AND YOU HAVE CHANCE TO HAVE A PENTA KILL IF YOUR TEAM IS GOOD !!!