Fujin isn't required on Dath for A1 but it's nice Sopdet insurance. Also good in case you need to stall a couple turns on Lifive since he puts up a damage absorb turn 2.
Also I'm looking for changes to A2 and beyond the King Tan change I'm not finding anything. Did JP get something else in addition to this?
I'm guessing the sopdet strategy without fujin is to delay and match three dark until she dies; hope for no skyfall troll?
Fujin is just such a do-nothing active that I find it hard to bring unless absolutely necessary; this applies to all of my teams.