Do Shieldbreaker's nightmare snakes scale with her level?

I have avoided using shieldbreaker in my torchless bloodmoon attempts due to the danger of her nightmares, but am giving it a go now. So far managed to avoid nightmares during the first two camps, and now she's level 2. So my question is whether her being a higher level will help deal with nightmares easier, or whether the enemies scale directly with her level? I need to take care of some short missions so if the enemies always stay the same level, seems like it would be a good strat to level her in short missions first?