That one is actually not possible to solo, as the north passage requires both sets of 3 (rune+lever+target) to be activated within seconds of each other, and the sets are separated by a distance that even with highest move speed, boosts and wings cannot be traversed in time. It is possible to 2 man VoN5 though (the lowest shortman I've done is 3 man, as I couldn't get a teammate with both the str and wis requirements at the time).