Only 2 forma is required if you match polarity with the stance. This high damage [Skana] is meant to be used in high mobility massed enemy units. Each strike increases combo count, which increases crit chances. Combined with [Bright Purity] and narumon, it should rapidly build up a chain reaction, eliminating large crowds. This is not a good build for specialized work, instead it is a build designed to work with my style of play. It's a [Skana], are you really expecting great things?