Samarog is the third boss of Raid 2 (also known as Bastion of the Penitent). Below is a curated list of resources that our guild thinks are the most useful for Samarog.
Recommended Video Guide
Additional Useful Information
Dulfy’s text guide: http://dulfy.net/2017/02/11/gw2-samarog-raid-boss-guide/
The following video is included as it shows how to get the keys for the gate/door blocking the way between Mursaat Overseer and Samarog. The guide starts at the 1:00 mark.