When preparing for a tough fight, it is possible to adjust your Accel Meter and Eleth Gauge accordingly before the battle. Use the closest save point, then exit to the main menu. Enter "Trials of Graces" and repeat a challenge in your level range. This will not raise your level, skill point, or gald in any way, but will raise the arte count, Accel Meter, and Eleth Gauge. Save its status upon exit, allowing you to start the next fight in your favor!