Yes it is possible to kill All the gorgons! If one two (more?) people go into the labyrinth and damage gorgons to the point of near death but don't kill them... You die obviously, but on respawn the gorgons remain on deleted health! I killed 3 by myself - super then gala on the other two! easy!! So....you do this on all (or certain) gorgons then get full fireteam in ... All gorgons nearly dead..... All fire on one command....Boom you killed All the gorgons! (firing in synchronisation negates gorgons gaining in strength as you hit them same time, any left are a doddle to kill as on min health!)