Please add the new Legendary trinket: Kil'jaeden's Burning Wish as an optional click like the Warlords of Draenor Legendary ring if it is not too much of a pain in the ass to script in.
Here is the suggested priority to use the Trinket for an Elemental Shaman to give you an idea of when it should be used:
(https://www.stormearthandlava.com/elemental-legendary-guide/)
The legendary trinket is a very strong increase for AOE and cleave situations... The damage is less pronounced on Single Target but still provides an increase over a non-legendary trinket setup. Always use the trinket on Single Target unless a period of AOE or Cleave is coming up shortly and you won’t lose a cast of the trinket over the course of the encounter. ...the trinket cd might have to be delayed during Ascendance and cause the loss of a usage over the course of the fight...
Rotation changes recommended: Treat the trinket like Stormkeeper. Save it for AOE if you don’t lose a cast over the duration of the fight.

Thanks much.