i dont have enoughe memory of nonhero strats i did raid soo in normal mode only *checks armory* 5 times. but i vividly remember on heroic our raidleader benching each and everone who got hit by his projectile thingy on heroic because it was instadead tried to sift through all the videos i have from back then from our SoO raids but there is none from Immerseus unfortunately.
and yes it does tick every 0,4seconds (not 0,25 i fuxed it up with the other swirl) dmg wise. this has been discussed in legth on the retail forums 2-3 years ago when the content was live on retail.
/edit
ok i actually am slightly wrong now.
heres the wowhead link for his beam ability with all the values and the swirls
beam http://www.wowhead.com/spell=143412/swirl
swirls like mini tornados http://www.wowhead.com/spell=143413/swirl
/edit2
god damn all this talk has made me so reminiscent of MoP and how much i enjoyed raiding there, watched through couple of our old kills and found our ra-den cutting edge kill https://www.twitch.tv/sunizahero/v/49855074 :D (beware alot of german talk and no this is not my channel was from our protection paladin during that time)
warmane hurry up i wanna play so badly :P
/edit3
could not let it go and had to cross reference and crosscheck everything multiple times seeing all that for me was couple years ago.
/edit4
https://www.youtube.com/watch?v=6KI2...=youtu.be&t=90
watch the hp of the guy getting hit by the beam. it is heroic though, so all in all it seemes frostmane immerseus has his beam bugged and it is dealing heroic damage values.

