Talk:Special Events/@comment-121.54.42.230-20150722113634/@comment-5184934-20150725140429

The formula roughly is ((ATK + BB-DMG%) * (Spark multiplier)) / hit. So if spark Boost from LS is 100%, then "Spark Multiplier" = 2.5.

If you can spark good enough (at least 50% of hits of every unit sparks), then Spark-boost LS is better. And don't forget that normal hits aren't affected by BB-boost LS.