[Losing her grip on his magic is the last remaining reason she had to stick around, so while her defenses and lowered and her attacks lose their momentum--she takes damage from his own attacks for a while, from this new found focus of his, but only until she builds a wave strong enough to retaliate. She's not strong enough to overpower him right then, but it's enough at least to distract him.]
[To keep him busy while she finally moves to get away from all this and recover.]