I did everything to test it for the better.
I even OC my cpu and it was better. (but battery drainage was faster also)
Im using clean master and battery doctor too and guess what.....i found the easy solution and performance boost in shadowgun.
Simple....uninstall battery doctor.
After that small lag spikes remained cuz of bad game optimization (everyone facing that one) but the performance boost was like 20%.
Find some other alternative to save battery like greenify and setcpu clocking.
I realized that battery saving apps are more performance stopers and ram eaters itself then helping hands...
Try it and report back...