Is 4-manning soa supposed to be impressive? His enrage doesn't even matter if you know what you're doing
4 manning Story Soa would be a joke.
4 manning Nightmare Soa? That's actually tough fight. If you think it's easy just go and put together a pug fraps/xfire your kill.
4 manning HM EV is a fun way to haze new recruits.
I wouldn't even take a new recruit to 4 man Nightmare EV.