I think a good compromise is to introduce a single item, carried in bags, that acts as a temporary container for each anima type that can then be emptied into the sanctum reservoir. This would maintain the RP elements of acquiring different anima types from different activities and the warm-fuzzies of a large sanctum deposit, without changing the system entirely by making it a currency. (FWIW I would be fine with it as a currency but if the devs feel there's an intended RP reason for having it the way it is, this would at least clean up our bags.)
