priiloader v0.3b has fixed many issues with the installer. I have not seen anyone with trouble from it. Patch ios36 and the system ios if you have not already with dop-ios-mod, then cross your fingers and install v0.3b. Once it is installed your friend will have decent protection from minor bricks. Unfortunately there are unavoidable risks during its installation. Best of luck.
Once it is installed be sure to never update or reinstall the system menu, or system ios. This also includes many themes. Doing so will remove priiloader.