Spoilers, obviously:
first time thru Act 3 I got the cutscene for restoring the Elder doll. but since i screwed myself over accidentally by teleporting one-way out, i had to reload the last level of the temple. THEN i somehow managed to "skip" the elder doll sequence and went straight to the last crystal fragment. so it definitely doesn't seem to be a requirement at all, which is very odd since the main game plot seems to indicate that the whole point of going to the temple is getting to speak with the Elder Ranaar.
However, if you skip the doll restoration anyway, the Elder is mysteriously "there" after you return from killing the necromancer.
what seems to happen is that EVEN IF you have all 3 of the holy symbols of Raan, if you continue to run south and pick up the crystal, the sequence for restoring the doll is never triggered. I had to reload a 3rd time, and go back north to a middle room on that temple level to encounter Raan again. THEN you can go back and pick up the crystal.