the amuing thing is while yes the breathing mask will work short term. In Halo the Forunners used a stupidly adcanced full sealed power armor and still the flood won.
The other thing is these are cultists they will have wounds already also they arent going to be able to constantly wear protective gear at all times, all it takes is one slip and boom.
The other thing is these are cultists they will have wounds already also they arent going to be able to constantly wear protective gear at all times, all it takes is one slip and boom.