what Danzo said is totaly correct. i will just remind that there is already one good function for your fragments that you have and dont know what to do with these. ninja menu-fragment refining. you can trade these for Iruka which is a very good support unit that you will use a lot, or if you have him you can trade the frags for naruto nine tails chakra.

even though it is not the correct place for suggestions, i will say it here first. one very helpfull function to be add is if we could extract the mood scrolls from units.

that would be very helpfull and not fragment trading.

good day to all