Kayle is an underrated champion and I see a lot of bad comments about her saying that she's the worst champion in the game,etc.
Well the problem that every body just play her wrong, kayle is hybrid and she should not be played as a mage or as AD, simply because if your playing as mage your damage won't be any good and you will just be a carry like soraka, but much worst. and for AD, Kayle starts with 0.5 attack speed witch is really bad and you are also ignoring her passive witch help her a tone in owning her enemies.

So after reading the whole guide make sure to get her, she costs only 450IP and she is one hell of a champion.

Kayle can pretty much do every thing,
-slow
-speed
-immune
-heal
-melee
-range
-farmer

Pros:
-really good damage
-can do anything (range, melee, heal, carry, etc.)
-fast paste (get strong quickly)
-cheap items but work really good with them
-incredible harasser
-can save many team mates by using his heal or immune spell

Cons:
-Ultimate don't disable stuns
-can be squishy in early game
-will be concentrated on by enemies

I don't really don't care about runes in general this is why i like to use defensive runes and some armor penetration cause it's really rare.

Defensive masteries make hell lot of difference cause it make you much tougher and make you penetrate the squishy sequence, and you put some in utility to get more exp, and some mana and health regent, and most important the longer duration for minions buff.

Passive:
-20% of Kayle's attack damage is added to her ability power
-10% of Kayle's ability power is added to her attack damage

Q:
-damage
-slow by 25
-while slowed increase damage by 8/10/12/14/16%

W:
-heal
-increase movement speed by 12%

E:
-go from melee to range
-you hits deals extra magic damage
-have AOE magic damage (Splash)

R:
-immune someone for 2/2.5/3 seconds

you start with for the attack speed buff and a . and some health incase of taking damage.
then you upgrade it as soon as possible to a after getting this you will be able to get plenty of kill cause you will out speed your targets at first levels and you will have good attack speed.
after getting some kills or farming minions get , this file give you a lot of attack speed and cool down reduction and it's really cheap (1140) compared to other attack speed items. and will make really strong as early as possible to get blue buff and kick some ***.

For now you got enough attack speed to wreck your enemies apart so you will be going for some Ability power and attack damage. so you will get for some AD, some AP and his passive which will stack really fast with your attack speed.

After getting this you will get malady size42 for more attack speed, some AP and most important his passive, which give extra magic damage and reduce magic resistance per hit.

Now after having awesome damage, you will find your self a bit squishy and running out of mana most of the time if you don't have blue buff so you will start building your self for because the mana, health that it gives and some AP bonus.

After finishing all these steps you should destroy your enemies in seconds, but if they don't decide to surrender and want to get owned more, you will upgrade your to a for more effects.

then just finish your build by getting for epic damage and life steal and spell vamp.

NOW YOU ARE COMPLETE BUILT!!!

all your left gold use it for pots and you can even start selling your cheapest items and changing them for some random high price things, like and you might switch your boots to or if there is allot of CC champs against you.

Kayle skill sequence is simple,

you use to slow and make your hit's deal extra damage.
you speed your self with to catch up with your enemies and finally you always have on in battles cause it increases your attacks like crazy.
And always keep in case you need to save your team mate or your self.

Farming is pretty easy with kayle, in early game all what you have to do is last hit minions, and after getting to mid or late game game you will farm like crazy when using your with your attack speed.

If you read the whole guide make sure to rate the guide and if you have any suggestion just say it.

And add "IR" in the end which stand's for "I Read"