Talk:The Sword Saint - Li Hsiao-Yao/@comment-109.125.117.11-20150810210058/@comment-3083005-20150811074838

In addition to above poster, there is a great post on the Tower of Saviors forum: Li Xiao Yao Leader Skill Analysis.

In short, the damage multiplier is for:
 * 9 runestones dissolved = x3.07
 * 12 runestones dissolved = x3.42
 * 15 runestones dissolved = x3.75
 * 18 runestones dissolved = x4.02