To try to replicate you need to use 2.5M hp modulator with all of the debuffs aplied to dummy - this is reguarding pure parsing. by default all values that appear on parsely is the 2.5M since that is basicly the amount of dmg every dps do on operation bosses.
reguarding the metrics, if BW doesnt use they should also use it. im pretty sure they prolly have their own system of measuring the dps and other values, but parsely is prolly the most used system by many raiders due to its many tools (and it comes to my mind revan push and pull )