NEVER aproach an enemy without alpha striking, ESPECIALLY another ad carry with high lifesteal and attack speed. The alpha strike is an IMPORTANT boost in damage and when versing another you are invincible if you use the well formulated combo i have taught myself of E,R,Q (to an enemy) and after the combo you have a GUARANTEED kill because even on tanks you will hit hard as FLIP. on basic ad/ap carries this build hits roughly 1052 so DON'T BE AFRAID OF TAKING PEOPLE ON i will honestly limit it to an ap carry, an ad carry, and a tank ONLY IF you take the ap carry out first unless the as carry has a stun (In which case don't engage this carry unless they are alone)

An important thing to remember in ranked is that you will rarely finish this build so build infinity edge BEFORE your second phantom dancer, otherwise it is pointless in blind pick because people will not see you coming.

Pros are that you can 1v1 ANYONE, cons are that if you are stunned you are honestly F***ed unless you decide to take cleanse instead of flash

try to stay away from your team and come AFTER your team initiates, if you do this you will allways secure the fight for your team ESPECIALLY if you have a full build

use your alpha strike OFTEN as yi and NEVER let minions get in your way, use the minions as a median for your alphastrike to harass them, in the jungle go for blue first and make sure you have a leash because yi is squishy early

mid game farm if you are at about your first p dancer is easy, just attack, you will rarely need to alpha strike but in early game use your Q for farm OFTEN