Just for reference, what kind of cooler do you have, a closed loop water cooler like a Corsair H80/H100, or a custom loop?
Here is a rough diagram of a Haswell processor. The actual processor has some parts in different places, but it's close enough.
The "ring" is your L3 cache frrequency/voltage and your Ring-bus (red in the diagram) frequency/voltage. As with all frequencies, it gets its clock from the base clock multiplied by the ratio. A faster ring frequency is better, but it's more important to get a high core frequency. I would advise getting the Core clock as high as it can go and then see if you can push the ring bus up. I'm not sure what voltage you should set, as I haven't used a Haswell processor. I would look at some guides to see the recommended voltage. The ring voltage is independent of the core voltage. The ring voltage offset is added to the normal ring voltage, not the core voltage.
The CPU GT isn't important. It's the internal GPU in Haswell, and you probably use an external discrete graphics card, so messing with the CPU-GT won't affect performance. I would again search to see what people recommend to do with the CPU-GT, perhaps you can disable it.
As far as I can see, that guide is helpful. I would suggest continuing to follow it's advice.
I hope that helps!