When you click on the Vanguard Ops Playlist the screen will shift to display your current Vanguard Rank in the upper left corner, your current Fireteam in the upper right corner and a series of [i]currently active Strike Modifiers[/i]. The leftmost modifier in this list will explain the current weekly Elemental Burn (or Singe). You will need to complete three strikes while equipped with the matching Subclass in order to finish the Weekly Challenge. Keep in mind your Guardian must have reached the current Light Level Powerful Cap (1570 through gear alone, so not factoring in bonus levels from your Seasonal Artifact) in order for you to obtain Pinnacle Rewards. (΄◉◞౪◟◉｀)