Most of the people says that the Lucky Board is the best Event to spend if you're targeting Power-up items, each time you roll a dice gives you a chance to get various items for Power-up and also for Seal/Summoning Scrolls, while at the same, earning some points too for you to use in Redeeming Items in it's shop, you may choose if you want to redeem Power-up items or Ninja Fragments ..

Same goes for the Lucky Star Wheel, usually 3 items available in that event's Redeem Shop is for Power, Charm Pack, Medium Refines and Myoboku Gifts .. Playing this event is good too since while having some points for you to use on redeeming something, you will also have a chance on hitting the Jackpot Ninja of the Event .. This goes for Wheel of Fortune too, but in this event, you will need to battle for ranking for obtaining additional rewards for participating in this event, the difference between the two events, this wheel of fortune doesn't have a points and redeem shop ..

There's an Event too where you can get a lot of power-up items and you can opt to not spend but still get a lot of items and fragments .. The event is called Great Plates, you can get 20 free keys per day, and with that keys, you can get tons of Mood Scrolls, Myoboku Gifts, Medium Refines and Fragments of featured Ninja of the Event .. In terms of Free Events, Myoboku Trial is also great, you can get Unbound Runes there that you c*e for Cultivating your Summons which gives good amount of power too, at the same time, you c*so get 60 free coupons per day but ofcourse, you must be careful in hitting the totem blocks for you to fini* perfectly and get the free coupons ..

Mobilization Mission Event, Fishing Buddy Event and Some other Events also gives Power-up items .. The only thing for you to do is to choose where and what to spend your resources too .. It depends on your needs or wants .. So be wise and plan on how to spend your resources, at first you may find yourself in some wasteful spendings but as the time passes, you will get the pattern and learn on how to spend good ..