[Senna]

The big attack isn't the core of the class; it's just something the user can use their build-up speed on for better results. That big attack is just the class's Ether Invitation, Kadouha, and so on. The momentum gathering is to gather speed; this speed provides different enchantments for said class techniques. More options as the user is moving faster.

The identity of the class is literally Speed, to go faster and hit or run away from your problems. A class that's all about dashing and running around and should be difficult to build without the presence of CEL.

A good way to look at the class: Flash or Sonic or any speed character, the class.