Description of Issue:
Poem of Bragi(Magic Strings) doesn't provide the full 30% after skill delay reduction when used with other after skill delay reduction gear/cards.
The skill should additively stack after skill delay when combined with other after skill delay reduction gears.
I tested below with the skill Tarot Card of Fate which has a 3000 ms after skill delay. Reducing it with Poem of Bragi would bring it down to 2100 ms delay. The same would apply for a Kiel-D-01 card which reduces after skill delay by 30% as well. But when both are used at the same time, the resulting skill delay should be reduced to 1400ms but instead it was reduced to 1470ms. Adding further after skill delay would provide diminishing returns when used in tandem with Poem of Bragi. I'm not sure if this is a bug or if it is working as intended.
After Cast Delay Reduction Formula