First boss is easy if u got 2 ranged dps, cause this blue lightening always drop on DPS, BUT!
If u got 1 melee or hell-no! u got 2 melee DPS, it's impossible to do, case tank have to dance with those aoe crap like a crazy one... and also ads, melee can't get em fast enough cause they have to run so much... so... dear BioWare, may be you should remove Melee DPS from da game in that case?