Hey Ferret, I'm enjoying the detailed posts/pictures. I try to do the same for my build logs as a lot of logs don't go into much detail.
If I may throw in my 2 cents..
I literally have just done the exact same cpu waterblock on bare die setup as you did, just with the 3770k instead of your 4770k lol. Here is how I applied Phobya LM..
Used EK's "TRUE 1155 Back Plate"
Changed the jet plate to the 1mm to create a more flat plane on the actual block and to get rid of any bow.
Also used EK's "Naked Ivy Precise Mount", used electrical tape to hold the cpu in place, slowly squeezed the Phobya LM out of it's tiny syringe and moved down the length of the bare die. Then I used .7mm thermal pad, made a cutout for the die, and placed it down. this spreads out the mounting pressure more evenly even just a tad, but every bit helps.
Did a 5ghz run, Cinebench and Prime95 a bit and temps never went above 75c, and voltage was way up; 1.54v.
The motherboard i'm using is not good for heavy overclocks however. Hence why I'm snagging a new one and some different memory to replace the AMD equipment in my 800D rig.
Anyway, this is your log not mine, I'm just sharing my experiences with bare die mounting, and hope that helps a bit!