Well i have been doing some experiments oh what should Olaf build first, and of course this is around the Tank Olaf paired with Atma's. Some sayand others say but have you ever though on Building a ?
has alot to offer Olaf for a really cheap price, lets comepare:
-cost 3250 and gives Health, AD and a slow on each AA that means sure dead for almost any enemy who cross you but it cost its more expensive than but its easier to build into.
-cost 3000 and gives ALOT of Health and Health and can be really efective with Atma's but you need alot of farm to get it .
- now for, it gives 250 Health for Vicious Strikes and an Aura of 20% AS and 12% Life steal for sustain and Support + a passive 15% Cooldown Reduction for more PEW PEW with your E more Vicious Strikes and more Ults and AXES all for Just 2145 Gold! and its also stard with the that you would normally get (at least thats what i have seen so far and what i do). Its a really Cheap item with alot of things to offer olaf and still have sinergy with , if you add you will get even more health to exchange to AD.
This is what i thing about what item Olaf should start with because its helps you alot in lannin phase or even in the jungle, as i know Jungle Olaf Use, and had worked for me.