With a 665 gear score, I have yet to be able to complete a calamity 3 boss rush. Where is the fun. I see the mechanics on BDfoundary, still not able. Is this entire area just designed for the end game gear players? Answer is yes...

So what you're saying is you didn't pay attention to any of the content leading up to the release and that you don't know how to read. Because if you did either you'd know that only 10% of your character ap and dp is accounted for and the rest comes from the light orbs. It says as much in the bdfoundry guide you claim to have read

A friend of mine defeated some black shrine boss in full Manos lifeskill gear. I think he did calamity 3 and 5 with it but not sure which boss. 

My issue is that the new area is pretty trash when you have latency issues.  I try to do the Bari C3 battle and end up with 6 of the ghost dudes exploding on me before I even get control of my character.  It is damn near impossible when you start the battle with 600 hp because of that.

I'm actually raging again this.. though I can say I don't drop to 600 hp but it's about 50%.

I'm finishing Bari lv5 at 3:04 and see people killing her in 45 seconds and am WTF am I doing wrong.