Awesome guide. I like the detail regarding iMessage / iCloud.
however, why not use clover to inject your kexts in the "Post-Installation" step? It is so much cleaner if you are using clover already. All the details are included in the guides you linked.
P.S. Sorry for the formatting...
I just finished up a very similar build using these components.
Intel Core i3-4330
HD 4600 Graphics (no discrete card)
I am only able to get 2 P-States so far, 8 and 35 if i remember correctly (I don't have access to the machine right now).