I also made a build similar to yours. Let me know what you think?

I was just trying to keep things open lol

A lot of ppl here have issue with comments like mine. Ive dabbled in WW, and I can say that ArP is very nice for him. Ive got a WW in one of my builds. If u want to see it, go to my profile and look at the the Strong Lane Presence build.

Oh wow I always thought Atma's was like Bloodrazor only 2%. Didn't know it was of your health. Hm. Well I'll change that :). Also you weren't harsh at all. :D

Also I prefer flash because it increase range of ult because you flash+ult in. However ignite is a good choice too.

I like it. Id prefer ArP to go with the ArP Quints. I dont like the Atma's though. Its deals 2% of YOUR healt. That 2k isnt doing to give you a lot of dmg. Like the Frozen Mallet and Madred's though. You got a great mind for theory-crafting.

Since you have Sword of the Occult, Id change Flash to Ignite. That would make stacks even faster to get. And if you are in a group fight, you target one with your ult, Ignite them, and focus on someone else.

I hope that wasnt too harsh