^ thanks for the repost, Tizme.
Update to this thread. Here are some pics from my hike last January 27 to Mt. Purgatory in Bokod, Benguet (in the North).
Pics from the jump off point, where we had a short orientation prior to the hike. The Mt Purgatory / Mangisi trail passes by 6 mountains and is 26 or 30 km, depending on where you exit. This traverse trail is rated as a 6/9 difficulty mountain and is not advisable for beginners.