Hey guys, I've mained Miss Fortune since her release four years ago, through ups and downs, buffs and nerfs. I believe right now is one of the best times since release to play her, she is an amazing duelist and has a very high damage output and teamfight potential. This guide was origionally made for patch 4.21 I hope it helps anyone looking to try an underplayed champion.

If you go back and you can buy a bf sword, you should be even/ahead in lane power compared to any other carry, whatever they build. When you have either pickaxe+sheen or bf+sheen you should be able to out damage(all burst) most any adc and adc build in the game. Her powerspikes with a damage item (Pickaxe/B.F.) and sheen or trinity force are insane. 30% crit when IE is finished doesn't seem like enough but will give you everything you need to be a 2 item monster carry, and last whisper is a necessity for her to be effective end game. Each completed item will give you a unique item spike you cannot feel on any other champion or build.

Miss Fortunes passive can most effectively be used to force trades when ahead in lane. The enemy support will usually be bottom side near brush, so you can push forward on the top side of the minions without being damaged and auto attack+q+auto attack to utilize her damage, either forcing them to run away or stand their ground. Being aggressive in the laning phase is key to being successful, otherwise ganks and other lane pressures will most likely put you behind in game because of her lack of immediate mobility.
In many games minion waves will die to turrets around the map, with some map awareness and your passive you can quickly roam across the map to clear them and create a very easy advantage for yourself. I'm hesitant to recommend ganking when you roam because of how easy it is to burst her down or countergank but you can make plays when you see them if you are a more experienced player.

Most supports help Miss Fortune in a lot of different ways, she synergizes well with everyone. She's a very basic character so I think more often than not the outcome of the lane is determined by the support matchup in lane. Different situations have different optimal support champions but I have found overall, all support champions find synergy with Miss Fortune EXCEPT Braum and Soraka.

The biggest reason not to pick a Miss Fortune or to find favor in other carries is if the enemy team has a lot of assassins and mobility. Miss Fortune during a team fight is very susceptible to being assassinated and kited, this can be a problem. Even with a frozen mallet/guardian angel/zhonyas some compositions are dedicated to killing you and you cannot always stop them. Staying alive is very important and your damage in a teamfight is consistent throughout. She also (more obviously) benefits from a friendly front line and hard crowd control to hold the enemy team down while you do your ult and all of your damages.

The recent changes to Miss Fortune can drastically impact the way you play her, but her build path can remain the same. I still prefer Tri, but I see other paths more effective now due to her ability to max W second instead of E, before the changes and the extra damage on her Q applying lifesteal. (Yeah, it's a lot.) The biggest change should be in your skill order, as an attack speed/crit heavy build with phantom instead of Tri is more effective now, than before. I've played both, still prefer Tri.

I have two diamond accounts, Toizoel and Random adc, currently both Diamond 3. Highest rating was 90 lp Diamond 1 before the arrival of masters tier a few months ago (using this exact build). If you have any extentive questions about Miss Fortune or about this build guide feel free to add my Random adc account in game and ask me. I also stream a few hours a day if you want to see the build in action.