Hi everyone! It's my first build and I hope you will gain some experience. Have fun))

Now you see my runes and it's seems strange so I explain it.
First runes are Greater Mark of Desolation. No comments.
Than going Greater Quintessence of Malice
, Greater Seal of Malice and Greater Glyph of Alacrity. I saw many builds with runes for mana and mana regenaration, but I wanna say that those runes aren't correct. If you wanna creat HOLY DESTROYER - no sense use Greater Glyph of Replenishment. In this build runes used for critical chance and attack speed cause we want deal very-very big damage.
All of this runes are big "+" to our items

+
I think that is good chose for MF especially if you go middle. Heal and Clarity - best spels for quick regen mana and HP so you don't need to buy items as Manamune ot buy wrong runes for regen mana.

All of those items are used for deal damage...very big damage. This shop in combination with runes give us good armor penetration, high critical chance and critical strike (near 1000-1300 hp)
First item you should buy is The Black Cleaver because it gives us 3 things: attack speed, armor penetration (means -15 armor every stuck) and damage; as we know, these position very important for us.
Than you may buy anything you want, but I recommend buy Sword of the Occult. With Black Cleaver you easy take stucks that increase your damage.
After those 2 items buy another and no matter in what sequence you will do it.

In the late game you will create a powerful char, who deal increasble damage and kill opponents in a few second.

PROS

+ high attack speed
+ above 59% critical chance
+ 1k-1,3k critical strike
+ In battle 5 vs 5 for example in forest you can kill half of opponent's team with your skill Bullet Time
+ almost maximum movement speed

CONS

- low HP
- in early game at intensive fight you quickly lost your mana even use Clarity
- stun or slow = death

I can't say something more so I wanna say good luck. Leave your comments, notes, if you want and have time you can correct my English))))