This exploit allows you to get 1,000 AP every 30 minutes. First, have the following items and the Armiger Action Ascension Node:

Armiger Accelerator: Included in the paid Holiday Pack DLC.
Blitzer's Fanfare: Included in the paid Holiday Pack DLC.
Shield Of The Just: Found in the Royal Tomb, west of the Disc, in Thommel's Glade.
Warrior's Fanfare: Included in the free Holiday Pack DLC.

Once you have those items and Ascension Node equipped, complete the following steps:

1.Go to The Three Valleys and find the area where a pack of dogs spawns.

2.Use the Whistle Command to summon enemies.

3.Wait until Battle Mode activates, then use Warp Strikes to kill the dogs.

4.Immediately after killing the dogs, activate Armiger Accelerator. This gives you +1 AP. Wait until the battle is over to activate it or you will deplete Armiger.

5.With the "Warrior's Fanfare" and "Blitzer's Fanfare" activated, you will get +3 AP for defeating enemies with A+ Timing and Offense. This require good timing with Warp Strikes - so it may take some practice.

6.As soon as the +AP number appears, whistle to summon another pack of dogs. If you do not summon immediately after the pack is defeated, you will have to wait until the report card is complete.

7.Repeat this process as many times as desired to earn an unlimited amount of AP.

Note: This exploit works after Patch 1.03. To avoid not being able to use this exploit, either do not install new patches before using this exploit or delete the patches. You can avoid patches being installed by disconnecting from the internet until you are ready for the game to install new patches.