If you are a melee toon and a frequent Col runner a good supply of Black Pages of Salt and Ash is a must. You can pick up 10 every 24 hrs BUT you have to be red PK (full one, not PK lite) to get them.
Here is the (revised) route I use. It is longer than necessary but it minimizes the time you spend running around Dereth as a PK. I prefer that both for philosophical and practical reasons.
Thanks to Mish for the tip about Sanctuary that cut the whole thing in half.
Requirements: Sanctuary Recall, WB or RM Chapterhouse Recall
Step 1: Get to Yanshi and then run to
Burun Cavern at 11.9S x 49.9E, enter portal, and then Tie to exit portal. (NOTE: If you don't have a free Tie you can just this portal and then PR to it, so long as you don't use another recallable portal before the end of the run).
Step 2: Recall to your Chapterhouse and use Altar of Bael'Zharon to become a Player Killer.
Step 3: Portal Recall to outside of Burun Cavern and then short run to the
Cells of the Black Book at 10.3s x 50.4e. Speak to Hassha and enter any of the four portals, as they all lead to essentially the same place. Get your ten Pages and then use Portal Tie to return outside of A Ruin.
Step 4: Recal to Sanc and go down one level to Adja's Memorial. Use it to return to Non-PK.
Step 5: Do the whole thing again in 24 hours.
It sounds like overkill and it probably is but I've never seen another soul on this route and I can do the whole thing in under 3 min if I have the exit tie, or 5 if I have to renew it by running from Yanshi to the Cavern.