Just in case anyone keeps track of this stuff:

With 50 mana Athleticism--
-380 Athletics = No climb
-400 Athletics = No climb
-410 Athletics = No climb
-420 Athletics = Climb! Occasionally fail tho

However, I was able to climb it with Athleticism and heavy rope at 380s ranks.

-Experiment!

No burden, clean health.
Human with 35 Cha, 40 Str, Agi, Disc, Int, Wis, 42 Sta, 50 Ref. Hope that helps!

Yeah, I usually hung out on Ranger Rock in the middle of Selgotha, before the climbing tests. Also, used the south bank to gondola RTS, to avoid any city-setting and attempted to do 'rangerly' things in the wild.

-K