Board Thread:Skyrim/@comment-124.254.253.172-20140216054251/@comment-71.107.40.112-20140216154736

If you have a large pool of magicka, the Lightning Storm can be most effective against Dragon Priests and even Dragons, especially if you've covered yourself with Atronachs. The reason why that particular spell is so useful is because one, it depletes magicka along with health, and two, it is the only spell that allows medium-massive amounts of damage to targets at great distances for a prolonged period of time, or for however much magicka you can afford to expel.

It's not always the most ideal spell to use, but there are certain times where it can come in handy. Admittedly though, I don't really ever use any of the other Master Destruction spells. I for one think they could've come up with some better Master Destruction spells, but...