If i use divination with 3 different seals on a full party:
6%*8 = 48%

Then i use sleeve draw and convert the next 3 cards into lady/lord

8%*3 = 24%

So in the end 24 + 48= 72%

Is the boss taking 72% more damage?
Am i going crazy here?

How much does cards actually contribute in the overall raid damage?
How to calculate that?

ps. I'm terrible at math so if i'm wrong i would love to have some explanation thanks