Evelynn is a meelee hybrid champion

YES! it is a good build.
At the end of the build evelynn will deal hybrid damage,a feeded evelynn will be op.
Take Doran's Shield for early ressistance.
Take the Boots of Mobility for a bigger mobility,cuz evelynn doesn't have a good movement speed.
Wit's End grants you bonus attack speed,every hit will give you magic resist and it will also deal magic damage along with your physical damage from basic attacks,but you'll get an important advantage because of the mmagic ressistance.
Take Ionic Spark then for extra health,attack speed and a very good pasive,it fires thunders at the third attack dealing magic damage.
Madred's Bloodrazor gives you extra armor,atttack damage and attack speed,but it also grants you another buff that will deal more physical damage.
The Black Cleaver will give you extra attack speed and attack damage,but it aso grants you a buff that will eal extra attack damage :D.
Malady will give you bonus attack speed and aility power and will give you another buff that will deal bonus magic damage.
You'll need a tank to help you,i dont recommend to be aided by a support cuz most of them dont have a very good survability,and you'll have to ks them :D or at least to be very careful about how you take kills because you are very squishy.
After you feed a little you will deal more damage,but your buffs along with the Blue and the Red will deal a very high damage,in a mach with this build i had 14/8/20,but i was ksed :|,and i have as tank an Olaf.
I also had a good lifesteal,i dont know from which item.
At the end of the build every basic attack will deal hybrid and very high damage.

With the large amount of buffs and attack speed you will be an excellent pusher so try to farm,cuz you will receive minions very fastthanks to this bonuses.

When trying to kill somebody go in stealth then get esxt to him hiting with Q continousely then use W and then use E,your W gives you bonus movement speed and your E will give you bonus attack speed which are very good thanks to your buffs.
I had 2.500 attack speed with the E buff so i thin its good,also your spells will deal a very big amount of damage thanks to your very strange hybrid build.
If you are hunted try juke without using your W first,try first to juke out of hits to become stealth,then run away from your opponent and use W to definelly escape its not as hard as it sounds.