If we go by N&A, we know that nothing "really" bad is gonna happen with high A score, only alterations on how a scene plays. With high A, they will act much more scared and freeze and not be as useful. Examples on how it was used is for example, when Hannah's house get's invaded while the MC is away and the girls defend themselves, Carol gets confronted with 2 baddies. With high stress Carol takes a bad defensive position, still shoots the first guy, but hesitates with the second one and then Hannah shows up and guns him. When Carol is confident, she set up an ambush by hiding behind the door, shoot crook #1, then gets in the hallway and blast crook #2 without hesitation. Same thing with Naomi at the beach house. Different event narration, but ultimately, about the same end result.
The most beneficial solution is to keep A low, but i wouldnt worry too much for now. If we go with ILS past works, we can expect at least 25 chapters, and A will go up and down on itsown without choices also as the story progresses, so as long as you dont meet the treshold for the less favorable outcome (leaving leewayto pick some choice that gives a stat increase but also an A increase), it wont matter too much.