Complex sentence: The flamethrower soldiers spread a small wave of flame back and forth, and (to make matters worse) take 4 bullets to be defeated, the heavy weaponry troops with flamethrowers are the most dangerous of this group.
Split into simpler sentences: The flamethrower soldiers spread a small wave of flame back and forth, and (to make matters worse) take 4 bullets to be defeated. The heavy weaponry troops with flamethrowers are the most dangerous of this group.