This build have a little bit of everything you need mainly Ability power and cool-down reduction and a sustainability.

Waaw, first of all i think you are being quite rude there. U can ofcourse give your opinion but what you are doing is border edge trolling.

Valid point on the ghost / Expanded mind / perseverence. You could have said this differently, so i could edit it.

Secondly i skill those spells in this order. It is my choice and i like it. Obviously there are people who would skill Q to the max, than E to the max and than wall, this is an option, but i don`t like it. I like my spells to be balanced on some champions. Not all, but some.

Saying i have a friend or another account commenting and rating is cheap?? Yes, he is my friend but he voted and rated on like 2 or 3 of my 10 or so builds and he did that honestly and genuinly. I have people downvoting some builds with comments like *0.0* and *:)* and you want to start on having a discussion of the honesty of the voting system? Excuse me sir, but calling me cheap on no grounds is really really low.

Try to make your own build for a change and CONTRIBUTE to the community. At least i am trying to share my builds.

PS. i often do different things than mainstream builds because posting 20 of the same builds IS NOT GOING TO HELP. All i do is give people something to think about.

I looked at a few of your builds and can see that you pretty consistently make poor choices.
I can't see why you would be posting guides when you clearly have a limited understanding of the game.
I don't agree with taking expanded mind on Karthus getting AA, but you not building AA and still taking it is much worse. Why would you do that?!
And 3 points in perseverance when you only need one to get to tier 2 masteries?!
Do you even know what perseverance does? It only increases base values.
At level 18 (when this mastery does most) you get 0.17 mp/5 per level. You need to wait 20 minutes to get enough mana from this level to cast a single lay waste.
And this is worth more than improved ghost?!

You are consistently skilling abilities bad. Have you not noticed that other people (that know what they are doing) maxes one skill on most champions?

I could go on and on but I cant see the point. You really shouldn't be making guides.

Oh, and having a friend or another account (Haarem) commenting and rating your guides is cheap.

UPDATE:

The other builds out there are worth while as well!!

Karthus is great on dominion lol.