User blog comment:Shinhwalee/Major Event Preparation Guide for Admirals (OUTDATED)/@comment-30221709-20161023012447/@comment-26402554-20161023231852

If you only have 15-20k resources by now (along with how you're getting taihas in aerial node), I'm assuming you're a beginner admiral? If that's the case, you won't really need Ooyodo, since you'll probably be doing Easy/Normal all the way through (if you do complete it). I've already completed several events without Ooyodo, and even got an epeen, don't worry about it too much. It's only when you're planning to do Hard that you need Ooyodo (and even then, some admirals choose not to use FCF).