Running maxed out epic mystic bow and epic hunter set with everything min/maxed. My GS is stuck around 140. Well whatever.
There is no chance I can kill the boss even in the lvl 100 vaults. Even lvl 67 vault makes me struggle because every weapon lacks damage. And before you ask yes of course I have crafted ranged damage on my armour. I´ve tier 4 maxed out Porter Pistol (it sucks) and all the other 3++ tier guns maxed out. None of them compare to the bow which isn´t all that good. None of the melee weapons deal any damage to the bosses. It´s like the lvl 67 version has the same health pool as the old 220 level but weapons deal around 5x less damage.
What is the design philosophy with these endgame changes? There is none?
I soloed the 100 Fabled Humbaba in lower gear than you're describing, but it was a longer fight than I would normally have and involved a lot of circling the edges. My average gear score is around 120.
The design seems to be specifically to encourage group play online and reduce the rapid solo farming that had been going on before, which the group that I play with was easily accomplishing.