Tales of Vesperia Yeager Secret Mission help

I am having problems with this secret mission. I have watched videos for help, but I can't perform artes that fast. I am on my first playthrough BTW. Is there any advice anyone can give that can help me out.

u will prolly find better help on the forum for this game, type in the game, click on it then, on the left hand side. click forum, which will take u to the tov forums

Here's a FAQ that tells you how to do all the secret missions and side quests in the game. Hope it helps.

http://www.gamefaqs.com/xbox360/945075-tales-of-vesperia/faqs/54574