It's a shame you haven't played Calendra's Legacy first. That's the Source.
In addition to the above recommendations, also interesting puzzle missions (or at least partly): King Abedzen's Tomb; Secrets of the Old City; In These Enlightened Times
I see you already played the likes of Beneath the Sands/Whispers in the Desert, Temple of the Tides, Forgotten Tomb and so on
Also one big environment puzzle of a classic mission of an entirely different kind: Thief: Brainchild
The presence of other...archaeologists is apparently meant to direct you to progress points they cannot use and that you otherwise wouldn't consider as your first option, and thus to trigger oh so unexpected (or obviously expectable) events one wouldn't deem possible - problem solved... Pretty funky design for its time of a different mould.