Jund Wildfire is a grindy sacrifice-value deck built around Cleansing Wildfire, Refurbished Familiar, and Writhing Chrysalis rather than a fast clock, so this is a mirror-like grind where your own card draw engine competes directly with theirs. Duress strips key sacrifice payoffs or Cleansing Wildfire before they can start the loop, disrupting their card advantage plan at its source. Fog effects are less critical here since Jund Wildfire's threats are incremental rather than a fast combat kill, so trimming Tangle for proactive disruption is correct. Keep the full draw and lifegain suite since this matchup comes down to who runs out of resources first.