First, focus on building a strong team of ninjas that complement each other's skills and attributes. Instead of spending your coupons on random draws, it's better to save them for events or banners featuring ninjas that are essential to your team's composition. You should also prioritize acquiring and upgrading ninja tools, which can significantly enhance your ninja's performance.

Second, participate in events that offer coupons and other valuable rewards. Events such as Daily Missions, Group Missions, Arena, and Survival Trial can provide you with coupons, ninja tools, and other useful items that will help you progress faster without spending money.

Third, join a strong and active clan. Clans can provide you with additional benefits such as clan missions, clan wars, and exclusive rewards. You c*so get advice and support from experienced players who can help you improve your game.

Finally, be patient and disciplined with your coupons. It's tempting to spend them all at once, but it's better to save them for important events or banners. Set a goal for yourself, such as acquiring a specific ninja or upgrading a ninja tool, and work towards that goal over time.