If you were knowledgeable on the game and character building, you would see and expect this just by looking at the build’s armour, physical resistance and DA. More to the point, I did not advertise or say it was Mogdrogen/Ravager/Callagadra/Crate capable anywhere. Though I do at least hope you’re using consumables for more stats in those fights, using Mark of Torment liberally and not expecting an easy full facetank.
If you want to make Valguur Celestial-capable, try this build and the videos for an example kill: