This build is for when your team has a lot of slows and stuns, but needs a ranged AD carry to take on bot lane. Sure your traps will come in handy but the focus here is punishing the other team while they are distracted and immobilized by the rest of your team.

First goal is to get some damage out of your first few thousand gold. Then comes the attack speed. Most of the items I've listed explain themselves. If your team has no problem keeping the other team standing in one place long enough you might be tempted to buy a Last Whisper instead of Frozen Mallet. Still, if you have any trouble staying alive in team fights, Frozen Mallet and Banshee's Veil will give you enough health to escape most tricky situations. Not to mention the Veil's ability to prevent some massive burst damage or deadly stuns.

Just stand behind your team. Encourage them to stick together. Then plow through the enemy team with your auto-attacks and a well placed Piltover Peacemaker. Don't forget to ult ;)

Props to Garlic Naan with regards to working on this build.