Just my two cents about the Peak.
Personally, I have a love/hate relationship with it. I get very nervous going into it and have a bit of a sick feeling as I’m going through just knowing that one death and phfft, back to the beginning.
I have only ever played solo and I find it VERY challenging. The best I’ve ever done is Maya to OP6 and that was a real accomplishment.
I know that I will continue playing it because it is fun and extremely challenging, and getting each OP level is very satisfying.
But I can totally understand the players who choose to stay away from the Peak. It can be a huge headache.
I actually do serious farming for level 72, OP4 and (when I eventually reach it) OP8. OP4 is just to continue on to OP8, but I like having a nice set of gear for 72 as well.