Ok...I've beaten the Tower of Druaga sidequest...twice. But I still haven't been able to get all of the items (even though I have three different walkthroughs)! Here are the levels:

12 - No Battlesuit...and I have waited for the Ghost Mage on the steps.
33 - No Blue Shield...even after getting Stahn's health "in the red".
43 - No Mystical Symbol...even though I have killed the slimes in the said order.
44 - No Magical Ribbon...even though I have killed the mages in said order.
54 - No Moon Crystal...no matter what I do.

If anyone has any ideas on these levels, I would be more than happy to try them. If not, I'm moving on to Tales of Destiny II!! Thanks and take care!