I recently added it to a personal pack. With it installed I was getting really low frame rate (I think around 16 fps or less) even with Foamfix, Optifine, and BetterFPS installed. When I disabled it the lag was a lot less. I wanted to confirm that Ars Magicka tends to be laggy since I vaguely remember hearing elsewhere that it was considered inefficient in it's resource usage. If it isn't considered resource intense then would you guys have any recommendations to improve performance when it's enabled? Thanks in advance for any responses I receive.