Just found out that KingRoot has it's own superuser connected with the installation called kingUser that works just like Superuser. So installing another Superuser app would be very dangerous to the device because of an incompatibility issue that may occur. In short installing KingRoot and an outside Superuser would be like installing 2 separate Superuser's on the same device that may cause the stock ROM to become unstable and push the device to have to flashed with the original stock ROM or a compatible custom ROM if bootlooping have been presented. So even if you have successfully perform that task without bricking your device, It would not be advisable to have anyone else to do it because their luck may not be just as good as yours.