YES. It is DONE! 100% every single achievement complete now.
A day ahead of my self-imposed schedule too.
And no, once the paragon 300 came up on my screen, I did not finish out the rest of the pit, eff that.
Only lost 2 characters, both necros, in this psycho endeavor. Not too bad for the road to HC 300.
10/10 recommend if anyone wants a challenge