i tried it and it works very well

I tried it out and it works great

would you please explain your reason for -1? just saying "its low" aint enough.

For me low, sorry :/

Yea thnx for the comment in my build..I also reviewed your entire guide and here are my thoughts:

First of all i agree with Rylais,i used to build that all the time but definitely not first major item because in mid game you need more AP since that is the part of the game where you deal the most damage.

Since you dont pick [cleanse] i suggest a quick hourglass first in order to stay alive at the point where you will get the most value from your champion.

As for the masteries 21-9-0 does give you the most damage BUT as i thoroughly state in my guide Katarina is not the champion that will deal heavy damage to all the enemy team just because her ulti is AoE.Katarina needs to jump in for the back kills in the squishy AD and AP carries and for that the damage output of 9-21-0 is enough plus it gives her more chances to stay alive long enough to deal that damage.

I also dont believe that [Doran's shield] will help a lot at start because you most of the times need to evade skillshots instead of autoattacks,i dont suggest that it is not a good item but it doesnt give youthe optimized start of boots if you have the ability and reflexes to avoid skills.I agree though that if someone goes solo top with Katarina the shield is the best start.

And as for runes your glyphs,you go for cooldown reduction..Yea it is common though that Katarina needs cd reduction but in my gameplay I am the one harrasing most of the times so i do it when my cds are up so I personally think that dealing more damage with AP glyps comes better but that is entirely up to the gameplay of each player.

And finally if you want more damage from your autoattacks i am sure you will find better use in [Lich Bane] than in [Hextech Gunblade].

It seems a funny way to play this awesome champion :)

@slapstickjoker
Doran's Shield is better than amplifying tome, maybe later i can make hextech revolver by this, but on start u need hp regen/hp from doran's shield because, with out this u can die very fast on mid, with Brand/Anivia/Veigar, or any Mage/Burster.
Sry for my english!

Very good build, now i know how to play katarina with CC! :)

Not much to say. I like this guide more than others because of the Scepter since I find myself getting more kills with it ^^ sadly i'm no pro with Katarina to give you advice on how to improve. Anyways +1

Ok to be straightforward:

I don't personally like the fact that you mostly concentrate on early health just to survive, but I tried thisguide a few times (without the runes you use) and it was ok.

so +1 from me, i guess you deserve it.

I think, this build guide is nice, so vote + for you!