Nocturne can be a pain in the *** if he can kill you right after being feared. That is why this build is so attack heavy. if you find yourself on a legendary killstreak with a team full of armour-weak characters i would advise stacking bloodthirsters, because his passive life steal will be super effective. phantom dancer and the frozen mallet (if you're being targeted, plus its passive works if chasing a target) are also late game builds.