Hmm just read through my first post and I don't want you to be mistaken about when to take meditate. First you should take Wuju Style, then you should take Alpha Strike, and then if you really want you can take meditate (though I will stack up Wuju style as fast as I can and leave meditate out). Please don't take me literally and take meditate as your very first ability.

On the plus your summoner spells are fairly decent.

A few notes. Yi is the strongest starting AD champ you can find. You are going to get more out of him with AS for the first items. Items that have AP are wasting stats for this guy since most of your kills come from back to back ult. You use sword of the divine which only plays on attack speed yet you only use one attack speed item. Yi can easily make use of two of the higher attack speed items before you should start stacking AD items. Now for runes. Except for this is an incomplete lower summoner rune build I would also recommend that you choose one stat for each color. Runes in my opinion primarily work as starting buffs to give you an edge, and splitting your stats up in the same rune color kind of dilutes your champs effective starting power. Your best runes in my oppinion are going to be crit chance, crit dmg, and armor pen. Then there is your masteries: first, you avoided your final offense talent which is a must for yi; second, you took strength of spirit which is useless for yi since he doesnt take any mana building items (smaller mana pool equals less hp5); finally, you spent one and only one mastery point in hardiness which gives you a whole 2 armor and should have been spent on your final offense mastery. Your ability progression leaves much to be desired aswell. Meditate I find worthless, because it costs to much mana for yi's small mana pool and doesnt heal that much plus it can be interrupted by a surprise gank. If you want the utility of it maybe take it once at the very beginning. Also you take alpha strike for your first ability... this is an easy mistake, but yi benefits from wuju style and gains an edge over all others since it makes him the stongest lvl 1 champ when he has that ability. You should consider a priority level of Highlander > Wuju style > Alpha Strike > Meditate.

To recap: Items are not progressive and stray from a strong AS/AD build which is what Master Yi is; secondly your runes are split up to much and are going to water down Yi's stats; third, your masteries need to be carefully thought out (Yi is a pure offense champ that must utilize his position to survive); and finally your abilities should focus more on Yi getting strength and killing power.

items and runes aren't quite great.