wells I are get armur pen and crit runse, + get atak spd or whatevs after

You usually go for boots after IE.

But it can also be situational.

Remember, never have a fixed build. Build yourself to counter the other team, and complement yours.

I build boots after BF Sword. After IE I will build a Phage for added HP and the occasional slow. Then it'll typically go something like Recurve, Giant's Belt, Last Whisper, Frost Hammer, Bloodthirster/Black Cleaver/Bloodrazor. Bloodrazor comes after Recurve if the enemies are super tanky.

But always change it up depending on what your enemies are doing.