Another Ending is a excellent CE for those arts focused servants. Not only does it give a high attack but it also offers Crit damage up along with a performance buff to arts cards all packed into one CE.
Increase your Arts Card effectiveness by 10% & Critical Strength by 20%
Increase your Arts Card effectiveness by 15% & Critical Strength by 25%
How to use
Another Ending allows those Arts focused servants to be able to deal more Critical damage and fill their NP gauge faster as well. You can get the benefits of those the effects of this CE when equipped on an Arts focused servants in a Crit arts team.