Newest event is extremely difficult. Journey to lunia. Required tier 4 level 100 characters. Very few with that level unless paying money. Also you get a bonuses for using certain characters and one isn't even out yet. Way too many banners lately and very expensive to buy gems. Not worth it without any end game. Stuck on story more and my team has great gear and tier 4. With so many new games out better just to move on. They give you bonus packs but the gems to buy them are never on sale.