Hi there , im here to present one of my main character build.Hope you will give it a try. First of all dont look at base stats. you will get your dmg output from mana & hp ( depending on situation).

Im not really sure if i have to explain all those things. So first of all MF ultimate is based on magic damage so we need to invest str8 in magic penetration wich will reach around 28 with boots. Rest runes goes ap to cast more dmg from& ofc .

So at start you go str8 foror to faster build .
packed up with atk speed runes you should be easy farm. but remember your role isnt ad carry here. your long range magic damage caster.
So once you get your early core items :

.

Get some recogintion of situation. If you're doing fine just go str8 for next items. If not take a look at those optional items.
Dealing with:

Heavy AP dmg team : repleace to Heavy AD dmg team : suggested to get to get more dmg output from or .

Once again take a look what opposing team build. So you can invest more Ap or more Ad.
Like you have few choices :

or + or and finish your build with or

WORD OF WISDOM
There are much more choice witch i propably forget about but its all about situation and what opposing team have. So if you cant pick your items good (& have a good use of your base stats with items like manamune, atmas impaler,archangel staff ect) dont blame me. Build was tested with many games, so many that i even stopped playing as pure AD MF. Comparing with other AD carry characters i have similar amount of ad with having nice AP output at same time.
Remember that you cant go 1v1 now till you dont get hextech. just stay in back cast your skills wait for opportunities.

LATEGAME
so lets say you're preety feeded so dont stay with those items you get at start. Once you completed your build with Rabadon or Infinity its time for rebuild. Sell guinsoo and pick some proper atack speed still checking what kind of stuff you need to mostly invest.


also isnt the bad idea.
and you can repleace your shoes with
Hope its explained enough. For anything just write comment and i will try explain why i picked that & and did that. If you need more chapters. For exaple fighting tactics or anything else just let me know.

Your role in a team isnt clearly same as classical ad carry. This guide is mosltly for adaptive players wich can decide when its safe to attack /come out. So you need to be patient stay in back shot some E i R and go for the win.

2012-03-07 Build reworked.Added Team work section .Now we have preety nice carry with an ap edge. over 3000 hp&mana +spellvamp &life steal. 300 dmg & ap . a bit of crit. (with fully packed roa& manamune) around 1,5 atk speed with green potion , 1,8 with Impure shots. Still not sure about atk speed item, need to test rest.
PS Im not good at making good looking guides so if someone willing to help i would be thankful