Can the inquizitors with Marok omicron lose the Reva mission?

the worst thing you could do is run 7th Sister and use her heal as the first move. That will suck away one purge stack from each and every enemy, and at the beginning they only have one. That eliminates all your bonus damage until you start attacking the same toons for a second time (e.g. after some other character has placed purge on them). 

I've still never seen a loss, but it is possible to make it harder on yourself, and maybe, maybe that resulted in a loss here? 

So I guess the questions are: 

Did you play it or put it on auto?

Did you use 7th?

Did 7th use the heal on her first turn? 

Once those questions are answered, we can maybe make some progress figuring out what happened.