Pins to show damage done by Gift of Arthas / Shadow Weaving

Im relatively new to Pins and Im looking to develop so im happy to be pointed towards some sort of tutorial if need be but my ultimate goal is to be able to apply an expression / pin to any raid or encounter and have it show me how much Dmg was added by abilities such as Shadow weaving or Gift of Arthas or Hunters Mark.

I appreciate this wont be one size fits all as the sources of the damage will all be distinct from each other.

Is there any sort of central repository for pins i can browse ?