builds work on both MF and cait

use this build if you become fed at start

End build items only in here

Infinity Edge (75 AD, 20% crit, 50% more crit damage)
Why?
good damage output
buffs double up and bullet time

Mercury's Treads (25 MR, Enhanced Movement 2, 35% Reduced C.C.s)
Why?
increased survivability

Phantom Dancer (30% crit, 55% attack speed, 15% movement)
Why?
good map movement with passive and boots
buffs double up and impure shots

Madred's Bloodrazor (25 armor, 40% attack speed, 30 AD, 4% of targets HP lost(magic damage) per shot)
Why?
survivability
tank killing item
buffs all skills but make it rain

Youmuu's Ghostblade (30 AD, 15% crit, 20 armor pen, 15% CDR, ACTIVE: 50% attack speed and 20% movement)
Why?
More damage
buffs all skills but make it rain

Hextech Gunblade (60 AD, 75 AP, 20% life steal, 20% spell vamp, ACTIVE: 300 magic damage and slows target for 3 sec)
Why?
heal off all skills
buff all skills
can kill runners

use this build if you are targeted a lot or to make MF less soft

why phantom dancer on cait?
better for passive then the Bloodthirster used to increase MF's ult damage