Yes. She has the AI of a pure healer/support. Her priorities are heal>buff>damage. She will never deal damage over support. It is incredibly lame and confusing since she was built so offensively in stats and abilities.
I use her as whm with only curaga enabled and it works really well like 80% of the time, but her AI is dumb as bricks
the 20% of time I lose in guild or pvp is if she is damaged she will walk next to another unit and try to cast curaga on them, with her in range of the spell, it will walk away and she will not be healed, try and fail again
Will I one hit an enemy unit? No I will cast curaga