Everyone that voted sunsinger has very little experience with the warlock class. Sumsinger is still top tier. Double fusion grenades are super effective (and annoying) and flame shield still wins you most melee engagements. Radiant skin + radiant will lasts a long time and you can tank a sniper high impact headshot! Sunsinger is still one of the best, removing one perk from the subclass tree didn't destroy it, it's just no longer the only option.