I'll show you my specific example of olaf
Prolaf works well in his team struggle to live and much much more aggressive pace has
There is also no problem if they gank you since you have enough life to survive to the active generation and kill both of you can test it like myself and I hope you will too.
Below you should explain what you should buy what runes you use and how you can play it well

So I use rune armor penetration and attack damage for maximum damage on opponents of any kind regardless of who it may be

So first you should her boots and buy drinks to heal fast enough so that their enemies in order to catch up to you after you buy Berzerker's boots at the beginning so that you may already have some tempo attack.
then you should definitely check as soon as possible to buy BF Sword harm for good and sufficient Lifereg Whom did you do that you should immediately save the Bloodthirster to initially not to kill almost since.
you have the Bloodthirster, you should get to you as soon as possible to meet phantomdancer critically.
did you buy the 3 things ye Frozen mallet so you slow down the opponent enough to kill them before they are on the tower.
did you buy it frozen mallet you fool Mail to survive almost anything.
Thor attempts to mail to come as soon as possible The black cleaver to kill even the most invigorating tank

If you like in the beginning is equal to e skillt can make her equal to the maximum damage but since it could easily happen that the opponent away with it
But this is not so bad to have to lvl 2, you then your ax with you slowing your opponent.
trying to meet with your ax again and again to pick up the ax that cuts down on your decay time