Hi,
sorry for the late answer. I have the same laptop and have experienced much better cooling/heat-performance so that the laptop no longer throttles during gaming by doing the following:
* turn off CPU-turbo by setting max performance to 99% in power options
* under-volting CPU using Intel Extreme Tuning Utility (XTU), currently set at -0.125V but depends on your CPU
* under-volting GPU using MSI Afterburner, check thread mentioned below for profiles you can download
* set a frame-cap of 60 fps using RivaTuner
* head-modded bottom of laptop case underneath the fans by drilling holes and gluing on dust-filters
* used copper-tape to remove gap between fans and heat-sinks inside laptop
* using a notebook-cooler with fans positioned to blow air straight at the fans located inside the laptop
Turning off CPU turbo and under-volting CPU/GPU is the least work and have big impact on heat-development.
The following thread has more good information on all the steps mentioned above:
https://rog.asus.com/forum/showthread.php?89061-GL702VM-amp-similar-Solution-to-Performance-issues-Overheating-Throttling
Hope this helps,
Hans