All I can speak to is our recent experience with two females here in our home. Both are adults, one is an aggressive biter, the other is was a non-eating WC. With the great advice of those on this forum we put in them both in the quietest environment possible with the lowest light possible. Not full dark but as close to it as is practical in a normal household (we also added newspaper balls for the biter).

Well within a relatively short time we have Brannagh the Biter who is definitely calming down. She hadn't even been using her hides as she constantly patrolled her sterlite in an aggitated manner and was exhausting herself. She now uses her hides appropriately and can be removed from her sterlite relatively hassle free (not for handling but for cage maintenance).

Saoirse the non-eating is eating! Plain and simple, eating...scared of us...but eating!

I feel now that the dark, quiet environment is a basic first step for snakes like this. You can't get them to eat or much else until you get those stress levels down and for my snakes anyways, this sort of environment of basically darkness and a short period each day of very low light is working beautifully.