On laning u need to farm as much as u can so u can destroy everyone why ur Q!You should start with boots and 3x healt potions or dorans blade.If u start boos on your first recall you should buy a dorans blade or brutalizer.

In mid game u should have Dorans blade,ninja tabi or mercury treads,brutalizer and a phage(sometimes a sheen too).In mid game team fights u should position your self on the back line.From there u should try to jump on the enemy ad carries/ap carries face and destroy them.In late game the ad carry will do the most dmg so u will try to destroy the enemy ad carry so u should be the frontilne bruiser.

I prefer to max Q first but on lvl 6 i upgrade my E because its a great escape and engage spell,then i max W and on lvl 11 i upgrade my Q and at last i upgrade W and max E.But if u have hard time and u think u need to upgrade your ulti for the damage reduce then u should go like lvl 6 -> Q lvl 11 -> W lvl 16 -> R