not gonna vote yet, but, if I may, I would like to point a few things out to help you.
I notice you start with Decoy.
Though this is a fine skill, it would be better to improve his farm by starting with another ability such as Nimbus Strike.
The bonus attack speed from Nimbus, along with hitting 3 enemies at once make his early level farming a breeze. If you are duo laning with someone you don't know, feel free to take all the minions, until your ally says they need some farm. Otherwise, it's all yours.

I do like how you max Crushing Blow, but according to the guide, you don't list how it CAN be used to hit towers harder. This synergizes well with Trinity Force...
Speaking of Triforce, I see you don't get an early Sheen in your build. I'd suggest replacing the second Doran's blade with said Sheen.
Even though the Doran's is nice, doubling it is best used on a ranged champ like Caitlyn.
Plus, the proc from Sheen will do more damage with your Crushing blow anyway.

Since your runes suggest you build him kinda tanky, I suggest that you place Merc treads as your primary boots in your build, since people rage when you get Berserk Greaves, because all they looked at was the build.

It would be prudent to explain things like an alternate build, since you have items listed for an offtank build(your warmogs, fro mal, and atma's). Also, if you do get fro mal, it would be unwise to get trinity force since their passives do not stack. Instead, replace triforce with another tanky item such as Force of Nature. With all that health, the passive from FoN, are too good to pass up.

Your cons list one thing being "Needs a ton of farm". But later in the guide you say, you only need about 150 minions. I suggest making a few changes there :)

Some of the explanations on your core item section get a little slacked off. I mean, you gave a great explanation on your Last Whisper, but after that, most of those items didn't have as good of an explanation.

Speaking of items, might I also suggest trading your Wriggle's Lantern for another item that does damage? Even though it builds into another item, Bilgewater Cutlass is a great item for a replacement for Wriggle's. It has an even better active, as well as more damage. If it's just the lifesteal you want, Executioner's Calling is another great item, ESPECIALLY early game. I don't let ppl know this in my Wukong guide, but I still run an EC, due to the fact that my lifesteal is really high, and it increases my crit by a good amount, and that sweet sweet active... a built in Ignite(minus the damage) making it so the one I'm after can't heal very well, and I'm still riding their *** like a monkey on a banana. Pun intended.

Most of your choices are really good, seeing as how they are the types of things that I do myself.
Feel free to look at my guide for suggestions, if it helps, my guide used to be #1 on the charts for a little while until trolls got to it really hard, so hopefully that helps yours out some. Don't think of this as discouragement, I'm just helping you out with some ideas.

Hope some of these pointers help ^_^
Thanks
Sincerely, Blakhart