This Is How Dissidia 012 [duodecim] Final Fantasy's Assist System Works

Looks like it works to me! The assist gauge has two levels. It builds up by attacking and using different moves. Standing around doing nothing depletes the meter. Once the first meter is filled you can press the L button + Cirlce to call for your assist character for an "Assist Brave" which lowers your opponent's brave meter. If you have the second gauge filled up along with the first, you perform an "Assist HP" when you press the L button + Circle. This attacks the opponent's Brave Points. This should add a little more strategy to the game. Hopefully no one exploits it. I think Square might get it right this time though. No tweaks!