To end this Kindergarden and bringing this thread back to topic:
I would also go for (some of) the Talis. I got the Mystical subtype to complete the collection (overwhelming+ward were gauntlet rewards already, have a look at your inventory if you have some!). I have 3 sets now in total but have not yet used them (no time for testing), but there is some potential for them of course.
Dupe Eddies don't help too much in my opinion. Maybe in Gauntlet AAA with class restriction, but apart from that they are just there to store some more unused talismans. Other dupe Eddies are easier to get, so I would not concentrate on a second FFE, EXECPT you have a clear idea that you want to use 2 FFEs for different things in the game, e.g. one for Arena attack, one for defense with different tali setups. That was my only reason to shard a dupe, which was gunner Lilith back in the days.