https://imgur.com/a/tZO2Irc ( raid difficulty is 10 normal so base damage is 600,000 )
257,220 is what I got hit for.
15% of 600,000 is 90,000 (15% because of Sanctuary passive)
600,000-90,000 is 510,000
510,000/2 = 255,000
https://imgur.com/a/IZ1ub3M
3,556,430 initial hit.
3,556,430/2 is 1,778,215 as shown above.
Versus this spell the passive Sanctuary does not work but this is another report I will make as there are other spells I believe.
Spell has now been corrected.