She's beefy healer that can prolong fights and wear out the opponent, by herself sure, she's B tier, but paired with good attackers? now that's a different matter
I have her at level 79 paired with my level 85 Warrior of light and level 99 whisper with whisper resisting 60 percent slashing damage and Magic damage by 47% as a spellblade using the Vermilion sword adelard trust master. Her main job is to heal but after casting magic barrier she has enough AP to use her limit burst so I have her cast protect and heal until a unit gets to close then boom