One more question. Is there a difference in mats when I do main story mission 1 episode 1 for instance which cost 6 ap vs a quest that costs 20 ap?
Droprate seems to be the very same across mobs, so look for the mission which has the best mob/AP ratio. Ideally, you'll farm 9 mobs per mission. You can look up the amount of mobs from here best, I believe. English Wiki doesn't seem to have details.
Also, you can disable already seen cutscenes. I highly recommend you do that to save time.
Thank you. I looked through the quests and I think chapter 2 Episode 1 might be the best way to go. 5 mobs for 7 ap. You only start seeing 8-9 mobs in the 18-20 ap quests.