User blog comment:Linathan/Unit Spotlight: Seraph Wings Kiravel/@comment-27468412-20160418042229/@comment-26140304-20160422003854

An 8 is what I consider "good". A 7 is what I consider average, similar to how the C letter grade works in the American system of school grading. Indeed, Kiravel is heavily outclassed even upon his initial release as there were units like Zenia, Zedus, and Charla who already provide a lot more utility than what Kiravel can provide at that time. A 10 would be meta-leveled, while not perfect but it provides a lot of utility for the squad and can support it extremely well.

Just look at units like Avani and Haile. They got 10s in Usefulness since they are all-around units that can fit into virtually any squad. While they do have some flaws (such as Haile juggling effects between BB and SBB and Avani having a grand pause start in her animation), they still have a huge impact in the squad. Just note that a 10 isn't always considered "perfect".