Wartune is centered around the medium damage by 10%, which makes the actual damage 90~110%. The Astrals that affect the floating damage expands those limits. For example, a floating damage expand of 20% will make it 70%~130%. Because of this, this astral is useless at lower level. This means that over many battle turns, this astral will help you exactly…nothing.
However, this astral has a powerful affect if you are a critical damage player plus critical enhancement. Let’s simplifyy the battle scenario: Let’s say if by average you can kill an opponent in 4 attacks – regardless of the skills used. On average without the damage expand it will take you 3~5 attacks. However, with the damage expand, you can widen the number of rounds to 2~6 attacks. How does this help? If you are lucky, you can quickly wipe out the enemy forces and have a higher chance of winning. This means faster kills.
Another way to look at this astral. If you can kill an enemy in 2 rounds instead of 4 rounds, you double your killing speed. However, if you get unlucky and kill in 6 rounds, you only lose 50% of the battling time. Overall, when this astral is mastered at high level with the orange astral. It can be a formidable tool that can 1 shot kill some of your opponents.