This CE is hurt most by its low numbers. While a higher-numbered damage increase may be useful against stages with defense buff gimmicks, this CE will find little to no use in most situations.
Jack-O-Lantern gives a flat 100 damage increase, applicable even against opponents with 100% defense up. As such, this CE should be used in stages with such gimmicks, though other than these, it can be used to increase overall damage if absolutely no other CEs exist.
Recommended Servants
Sakata Kintoki, Heracles, and Stheno have Divinity class skill.