Being the recruiting coordinator at Bain for 2 schools in Spain and Portugal (NOVASBE and ESADE) I had the opportunity to master CV/CL screening as well as preparing candidates and friends to MBB interviews.
My approach consists on using real life cases (adapted to interview format) and provide detailed and practical feedback across the usual dimensions you are being evaluated (communication, problem solving, structured approach, empathy). Also available for fit interviews, I have done it multiple times with friends and candidates.
I am also available to share my experience at Bain if that helps in any way.
Glad to help you! :)