Irelia the blade dancer: is a champ that relies on resetting your Q and having your passive always ready for fighting, your passive can be collected before fight or mid-fight thru your abilities

Irelia's Q: lets you dash over to enemies or minions healing your self but if you kill that minion or enemy with your dash then you get a reset/stack and you can also get stacks if you don't kill the target

Irelia's W: deals more damage as it charges and it also blocks AD damage not AP

Irelia's E: sends out to blades that stuns every target between them whether it is a minion or an enemy, and she also gives a mark on the enemies giving her a free Q reset if she dashes in with that mark

Irelia's R: Irelia throws a massive number of blades that explodes when it hits the enemy making a wall and every enemy inside that wall gets marked, which means a free Q to them and an E after that giving you a lot of dash opportunities

Irelia mostly counts having her passive before fighting, her passive allows you to have extra damage so if u don't have your passive forget about one-shotting your enemies ,and when its a 50/50 fight never start it without your passive , your passive can be easily reached by Q'ing a couple of minions then starting your combos, just because your passive stacks aren't there when the fight starts doesn't mean that you cant get it with your combo thru the fight, there are 5 stacks , your E gives one , your Q gives one with each hit so try to get it stacks thru Q resets and your R gives one but if multiple targets it gives more based on the number of enemies inside your ult

W-E-Q-R-Q-Q
you W a full hp caster minion getting him low enough to Q and get a reset then you E the enemy and jump on him , then you ult and Q again then save your last Q if he flashes or something , its always best to save your last Q to finish off rather than wasting it

OR

R-Q-E-Q-W-Q
this combo is for enemies who are in ult range but a bit hard to get to, you make sure there are minions around them and you ult them, leaving you the chance to jump on the minions who get hit by your ult and on the enemy closing the gap between you two,

the flank combo
R-E-Q-Q-E-Q-Q-W-hydra hit
how it works basically
you ult 2-4 people and before going in you put ur first E so you R-E
then you Q the closest to you and then Q the furthest which means that you are quickly behind the enemy which gives you a chance to close your E so you Q-Q-E

then wiht your new marks you Q the closest then the first guy again ending it with a hydra hit on all and a W is up to you might get you a sheen hit

like the other combos, you can also try this
R-Q-E-E-Q-Q
don't worry about your stacks your always guaranteed to get them on a combo like this you start with your ult, jump on the furthest and try to E both of them, if you only E one of them then jump on him and finish him off before moving to the second guy

for this one its always better to have flash, so you
FLASH-R-Q-E-Q-titanic hydra hit.
if you are fed enough this will make the ADC disappear and its the most used combo, if the ADC is hard to reach then create a distraction, how?
start your E on the tank or midlaner making you reach their frontline, at this point the ADC won't be much behind, letting u flash-R-Q him and while the enemy team is trying to get you off the ADC, your team goes in guaranteeing you a won fight

normally its okay for you to rely on Irelia's Q to last hit minions as a new player it guarantees them and keeps your passive stacks prepared , so in the late game you are actually able to one-shot the mage/back minions with your Q giving you better chances to reach the enemy, Irelia is a very good gap closer in league

Many people lose their lanes its a common thing,what I wanna show you is how to get back up , Irelia is a champ where if she buys 2/3 full items it can get her back into the game if she is late so rather than getting back on late-game you can actually catch up on mid-game while enemy arent super fed yet, but not by fighting the most fed one , its by either fighting their adc if he is squishy or their mid laner if he isn't fed, look for the weakest one and feast him, plus a few more minions and you are back into the game

In the end it's up to your farming skills and how you like to do your combo's practice them, never go in if u cant your stacks before/mid-fight and its easy to escape fights and dodge abilities when you Q the minions near u that's what makes Irelia special, a true 1v5 champ
good luck on the rift. and I would appreciate a like on the guide