i did it on day 1 with a rakata geared madness hybrid sorc and xalek.
this fight is not hard. people are just not great at the game; which isn't meant to be inflammatory. mmo players have an overinflated sense of their own skill level.
That's not even specific to MMOs. People in general have an overinflated sense of their own skill in pretty much...well, everything. http://en.wikipedia.org/wiki/Illusory_superiority