I've done every ARR/HW/and STB EX blind in DF.
They're doable and most mentors have me on their shitlist because of it, I've sent in so many reports for abuse from mentors and been blacklisted a bunch but it's 100% possible to do
My favorite is when I got Zurvan EX after a 4 hour queue, and Primal Mentors from NN kept queueing in to try to vote abandon to "clear the mentor hazard" from the mentor queue, because they kept getting put in there with me after abandoning.
Eventually they stopped sperging and we skipped soar on the literal first pull and cleared in like 3 pulls.
Here's a screencap from that Zurvan EX party as the mentors typed to me that this was impossible and we instantly skipped soar after the first pull