These are Rinoa's default statistics by level, without modifications. She seems to have the best stats in the game. Perhaps this is because she becomes a Witch during the course of the story and becomes unplayable at times.
As expected, her base Magic stat is the highest out of all the characters. To make Angel Wing more powerful, try boosting Magic past maximum by equipping GFs that have Magic Bonuses. You can also Junction the best spells to her Magic stat and use the GF Magic Plus abilities.
With FF8's Junction system, it doesn't really matter what each character's base strengths are. The Junction system makes the game easily exploitable; one can Draw or Refine multitudes of Spells and Junction boost godly stats. Rinoa starts off as a stronger Magic user than Physical attacker but it soon evens out.
The real strengths of a character can only exist in their type of Limit Break and weapon upgrades. Since Rinoa has three different types of Limit Breaks and the best base stats, she is a powerful character whether or not you have kept her in the main party. With maximum stats and Auto-Haste, the unlimited casting of Meteor while on Angel Wing effortlessly makes her the most potentially damaging character.