This built guide is how i built these 2 crazy op players when i killed alone the baron with each one..
and realy i f****** anyone who wanted to kill me or i wanted to kill

i choose these runes because their dmg and attack speed
if you dont want these another good opion is armor penetration runes.

these are the best masteries on my opinion for these 2 guys
the defence masteries can be replaced by utility masteries because master yi's and xin zao's mana is very low

What to say: great damage , full attack speed, and a lot of life steal.
If you attack then you kill..
if you want you can change one bloodthister with one frozen mallet

whell i chose this spels to make easy to escape or to catch someone..
ignite is also helpfull and it is a good combination with flash or ghost
i dont suggest any other spells for them

Well, if you follow this built then you will kill a lots of players..
and remember : The best defence is the attack....