I've checked the logs, and if you are interested in seeing who took damage from what, this is the commands to put into the expression-editor:
(type = TYPE_HEAL or spell="Lightning Storm") - This is the unavoidable damage
(type = TYPE_HEAL or spell="Lightning Diffusion") - A hit from a ball
(type = TYPE_HEAL or spell="Focused Lightning Detonation") - you were standing in the spot where lightning is going to strike and create the 4 balls.
Just copy the command from ( ) into the expression editor under "Analyse - Damage taken)