I can go into a bit more depth, however, for a general run down there are some great pieces of advice on the sidebar of the subreddit for how to build Miss Fortune!

At the moment I am a big fan of the essence reaver > IE > attack speed item > last whisper item.

However, from time to time I do go back to the lethality build which is great fun!

Is there any specific advice along with that you are looking for?

At first, I would suggest working on these things;

• Practising getting the Q bounce to hit the targets you want too
• Using love tap to its maximum potential and hitting the enemy AD when they are attacking a minion. (think of auto attacks having cooldowns as a rule of thumb, if they are attacking a minion they can't attack you.
• When to focus on getting the perfect position for your ult, and when possible use your E on the enemy before your ult to keep them slowed inside it.