It seems to me that the community at large forgot how this boss works. So two quick reminders:
Firstly. If you don’t want to get rooted by the static cling spell, you can jump when it’s cast and you will not get hit. Doing nothing and then spamming “DISPEL” in chat makes you look lazy. Executing this correctly will also get you an achievement, btw.
Secondly. After the first storm is over, he will cast static cling twice before another storm. Which means that dispelling his first static cling is a waste of mana (keep in mind one single dispel costs 3.1k mana). If you can’t stand being stuck in place anyway, see the first point.
That is all!