User blog comment:GreenMoriyama/Nine, the Magus of Elemancy (collab w-Lesdin)/@comment-7709681-20170913024132/@comment-7709681-20170913152051

(Cardinal Flare's(NFiery Garnet's damage))(Cardinal Nova's increaseSet Taaffeite's increase). All of this is assuming the fact Fiery Garnet's damage can stack equal to the amount of charges, since there's no indicated limitation in them.

In that case, the same problem is applied to Coursing Saapphire and Turbulent Emerald, with the slow and MS boost being able to stack equal to the amount of charges, respectively.