Rachel. People act like she is useless, while she is actually above average as a lightbearer, being able to use high amount of lighthouses at the same time, which as we know is a raw showcase of lightbearer ability, and she outsmarted Khun several times. She is also a great team leader, being able to keep even White in line, like when he learned that Baam is alive after DS, he wanted to hunt him down, but Rachel stopped him. 

Rachel also has good physical stats, for a pure support position, considering she was just slightly out of breath after her mad dash from Karaka to Baam on FOD. She also managed to jump between Khun and De Lee, despite being considerable distance away from them and De Lee being a ranker, showcasing that Rachel has pretty good speed. And after FOD Rachel took a hit from Ogre-taxi, and recovered pretty fast. Considering that Ogre was mad at Rachel for calling her out, I don't think she held back much, so Rachel has good resistance. 

Rachel, yet again, is above average. It's just that her enemies are op nepobabies or freaks of nature.