Hey, try this for a decent OC:
BCLK: 125
Strap: 125
Multiplier: 36
Voltage: 1.3v
That's a 4.5ghz OC with a base frequency of 4125mhz... 125mhz above Skylake with a boost 300mhz above its top clock. You should blow the 6700k away if this proves stable. The 125 strap and BCLK aren't stable for everyone. Lucky for me, it is though. I personally don't have the cooling for 1.3v but you sure as to hell do. If it is stable increase the multiplier to 37 and so on. If it fared well, I'd bet you could do 1.325v and try for 4.7-4.8ghz however whether or not that .025v makes a difference in degradation, I don't know.
Edit: nearly forgot cache. This is where I face issues with anything at 4ghz or above.
What I'd try:
1.1v
Multiplier: 31
Increase the multiplier from there... You should be good up to 1.3v as well, BUT rather or not heat is a problem is for you to figure out. Generally you want to stay one step below you're turbo clock if possible, but cache doesn't return much in terms of performance.
If you want to, RAM is so,etching to clock up as well.
Here's what I'd go for (what I run stable):
1.35v
2750mhz
13-13-13-30-2
I'd stress test for 15 minute sessions after each of these. If the first step goes without a hitch bench it for an hour. Rinse and repeat for cache and then for RAM.
NOTE!
This is what I can run without or lens however due to cooling isn't my 24/7 clock. You may prove lucky or not as lucky depending on the quality of your processor.
Edit 2: One more thing. While one RAM strap may be stable, the strap below it may not be. It's weird, I know, but that's how it works. 2666mhz and 2600mhz are totally unstable for me, but 2500mhz and 2750mhz are perfectly fine. Don't recommend going above that otherwise you lose timings. Having a CL as low as 13 at such a high frequency is rare. I'd suspect 14 would work better for most people. Ironically 2333mhz is more stable for me then 2400mhs, the stock XMP speed :).