I've never used Stark's, I was always confused as to whether or not the aura's benefits affected yourself as well as your allies, so I never bothered using it. I'll try it out instead of Malady and see how I like it =] I also generally find that I don't get enough gold to get the very damaging items =/ I've only actually been able to even complete this build twice >_>

I like the idea of Rageblade, because Rocket Jump and Buster Shot scale well with AP.
It could give you that extra kick of damage against squishies during the early game.

But in my opinion, your stacking far too much attack speed after the rageblade.
Rapid Fire and Rageblade should be enough attack speed to abuse Black Cleaver and you'll desperately need some attack damage.

Additionally, Malady is inferior to Stark's Fervor in my opinion, unless another team mate builds it or unless you're the only physical DPS champion in your team.
The armor reduction with Stark's and Cleaver is just insane.