I'd have to completely dissagree that masa can be done in 2-3 days even if no-1 else was campin croin/carabosse while u spent the time doing it (which they will be for many reasons). Unless you have 2-3 friends willing to spend 16hour a day for 3 days to help u get the pop-sets/itmes needed.
Also, I've made Glavoid pop sets in 30mins, and 4 ppl's is best for him too. 4 pop sets+4 kills every 3hour for 8 shells. If you had 3 friends to spend 3hour doing that with you for 1 week, you could be done with Glavoid (by your thinking).
The op was askin about storage issues however, and with all the seals and gems you have it does become an issue. Theres no reason SE can't make them stackable. The ease of the Emphereal weapon doesn't come into this thread.
Taking a break.