Her healing abilities are literally Cure and Curaga, she is called dancer but the dance part of her is buffing. Dancer is not actually that variant of a job within the series and has a pretty constant theme of Debuff the enemies occasionally some party side buffs though mostly only when mixed with Bard and White Mage. Dancers largest variance comes from XI where the job had a number abilities that functioned similar to other roles including heals and a provoke for tanking but even as the outlier its still got a decent focus on debuffing enemies. That is to say its not without variance, like Mog's GeoDancer hybrid or Penelo who is a dancer with access to white magic.