edo treasure was changed few months ago, now it gives 1-2 frags every 60 (like every other treasure) instead 1-2 every 30.

ontop: if you want to get missing frags by pulls then pull from the treasure you also want ninjas. If you dont have kage SR, that's propably the best choice. If you do, look at what u r using and work to get those ninjas to higher star. You can 4* roshi for example, if every other treasure seems 'meh'.