JMS: The Countdown begins..

However, some of the mobs have drops that don't drop anywhere else. Eg, Shiny Bullets from most of the Memories area of Time Temple.

Yeah, they also drop some really nice scrolls (Overall Strength and such) but even at tespia drop rates they were quite rare. I guess this is also the only place you can get Time fragments for Reverse weapons, but again it's going to take ages to collect 45 of them.