i know takes time but its necessery if want to take game in your shoulders
even if you lose you can win the game if you target the right hero and with little luck

well its true that you are able to take easy pentakills like heimer...ryze...ashe..well these kinds of squishy heroes
but dont rush to kill alistar who can reduce the dmg effectivly or heroes similar to him

if you played well then you must have 20-30 kills 5 deaths and some ***st not many cause none takes yi's kills he's too fast
also at 18 lvl try backdoor you can win the game so easy

you gain lifesteal-dmg like twice if you syack it full

choose what built best suits you but i prefer this one especially if consider that bloodthirister dmg
you have

700 dmg
huge lifesteal
huge speed attack
consider that with only 100% lifestel you gain 1400 hp every second so how can yuo die?
except if they stun you

look i will update it soon
just remember jungle-creep care at 18 you can kill only 2 max heroes at a time
and learn to play him by taking him 5 times in row at least
choose from the items what suits you more you can take others too this is just a basik built
you can reach this built all the time

i not sure about the runes-masteries-skills but this is what i would choose i mean yi nedds dmg and speed nothing more nothing less

if enemy has armor try armor penetration like blackcleaver,youmus etc

try editing masteries/runees as you like
remember yi easy to die and easy to kill
yi means backdoor and needs a lot farm his items so expnsively

some try yi ap maybe hexter gunblade is good it ha ligesteal/dmg/ ap with spell vampiration meanung you do yur 1st ability full your hp a little(actuallly alo t) and the best the enemy wont know where yu will apper in ganks especially noobs(no offense) will lose you and wont attack you also if you confuse yourself you an always lock the screen

i messed this guide very much but now its fixed if you play good you ll own the game
remember ward the map if you see squishy heroes run and kill them with yur ulti care if it is a trap

well maybe yu ll win but trust me in hight elo he sucks he s too easy to kill
altough unstopable if feeded but in 3vs3 you woont have the time to feed if eemy is decent

remember take last hits only this is the strongest and most importank thing take creeps 20 creep mean 1 kill have 60 creeps more = 3 kills then you op and slain the enemy

yi is squishy but slains enemy so easy
i hate him i nrank he sucks but yes in normals
yi=backdoor

feel free to change them maybe frozen mallet =slows enemy + hp nad little dmg

feed free to change them like ignite flash to escape through walls not health ot like that teleport for perfect backdoor etc

kills easy
backdoor
fast

easy to die /to target him
need big farm

most importan thing creep a lot take enemy heroes steal kills you need the very

guardian also good big dmg speed lifesteal you resurect and ik killlll them especiallyy champ like ashe