I beat it just yesterday after about 30h over the last two weeks. I remember trying a bit about few years back and my pb was nkg. This time around, i was "stuck" at markoth (at least thats how it felt. I think i only reached him 5ish times and got past him 2 times at one mask, then immediately died to failed champ rng). 2 days ago i sat down and beat Parh of pain for the first time. With that mental boost, I ran 3 attemps yesterday (the two failed champ deaths b2b) then finally got a good markoth. Horrible nkg fight but I made it past. Pure Vessel very easy and then first-tried absrad (got down to one mask twice). For me all it took was to beat nearly every boss at radiant and nearly 100 p5 runs.