but if you want a solid diagnosis of a serious problem you want the bloke with the best type/technical knowledge, without distractions. Generally this will be you.
Unless you were flying with the chap I flew with last week! An extremely experienced former Boscombe Test Pilot who knew just about everything about the aircraft and how/why it flies! Quite humbling but he is a thoroughly nice chap to boot!
Crew resources, utilise them dependant upon the experience on the day.