I'll point out that Finger of Death is a standard action, while Death Gaze, as a gaze attack, requires no action. Furthermore, Finger of Death is a 7th level spell, so I don't see how a 10th level sorcerer is getting any of them at all, let alone six per day, Versatile Spellcaster be damned. As for your allies, all they need to do is a. stay more than 30 feet away from you, or b. be immune to it, both of which should be fairly easy to do.