most ppl always say AP Katarina is better, so tried the best AP Kat and it sucked.

I couldnt kill any1.
I didnt even had time to use an ability coz i was already dead becoz of the low def and health so what does the AP matter then?

This build is good

The build is total **** at the start of the game its not 2 bad but when ur higher lvl its like u have a lot of ad but not good critical chance so mainly what u hit is 300 at lvl 18 and that sucks... u cant kill any 1 and ulti hits **** so i think the build is ****y as hell

**** loads of marks on magic pen but you gear her AD?
Something is very wrong here
and all u people saying i got 30 kill 1 death and 23 - 10 deaths
u clearly aren't playing at a high level. doing well vs **** player doesn't make it a good build

i just went 23 - 10 - 30

This is a good Build i use it IT is good i went 30-1 with it
it is good

Hmmm no, Kat is pure AP everything is wrong.