I don’t think that providing trash with stealth and invisibility detection is a good idea, feedback was that there’s too much trash.
Also, IMO. Lead designers could add respawns points near to each boss, instead of players using a soul stone on healer to avoid running again for next attempt.
As per new feedback, I don’t know if this was a bug but like 3 times, the Boss Vigilant Guardian during 1st phase activated the second and third Automated Defense Matrix at the same time on Heroic and then my core could’t use the third npc shield to protect us from Boss AoE, we found that clearing all enemies too fast was the problem, so we keep 1 add alive on the second Defense Matrix, that way the third Defensive Matrix won’t activate ahead of time.