4940mx isnt worth the trouble, silicon lottery was poor for it, 4930mx will do fine.
Also if you are using Compal EC via HWInfo64 to force max fan speed then you will lose the GPU fan as a result. I got around this by cutting the control wire and just let the fan run full speed. Otherwise you can alter the fan tables with an MX chip in the unlocked sBIOS iirc. A14+ is a good choice, though there are other options too.
Some people install a simple on/off switch for when you want EC to control things and when you want to keep temps as low as possible.
If you want to get the max performance from the CPU you will likely need to look at what digits to punch into the bios for forcing max power allowance (that can be later controlled via software if desired).
There is also a means to "unlock" the haswell chips to behave like an MX chip as well. I believe there is a thread on the forums for that topic.
For best input lag I would recommend PEG mode instead of SG.
Happy trials, I had a lot of fun experimenting on my Ranger back when I had it :)
Also you signature is way to large, please reduce its footprint to 8 lines.