I feel for you and your friend and hope they get well. But especially with mental illness, you only have so many tries at a therapy before the patient gives up on ever getting better. So I think the "see what sticks" and "you might as well try X" approach can be more dangerous than most people realize, because it eats up valuable patience. So I'd rather prioritize such suggestions, and maybe try the ones that are known to be working at least some of the time, first.