Always it breaks my heart when people end up in separation.
It is usually hard to find a therapist both of you can trust in, and also it requires a commitment because if there is no motivation, very little can be done. They ask in the wedding if you are willing to love him/her. If there is no will very little can be done.
If you end up in divorce (which I hope will not take place), at least it is recommended to work on yourself and not to rush to new relationship... The depression will take place at some point after divorce and that period need to be overcome so that you can better continue with the new person.
Therapists are usually just means of communication - they do not give much tips. Their job is to try to help the couple onto the same page. With us it took 3-5 times to get started, then the following 5-10 times were processing and the rest of the times it was new discoveries that popped up for further therapy which we decided not to take at the moment. Usually pariterapia has not more to do with religion than buying groceries (Bible gives rules which foods are allowed and which are not, also marriage/relationship with commitment has its roots in the Scriptures).
The academic background of the therapist we used was Master of Theology so she understood religious things and way of thinking.
Okay I guess I have nothing more to say here anymore to this topic. I wish you a good evening/night.