Classic Mantis was a human martial artist heroine with a empathic gift. No healing she could just sense danger in a general way.
She has gone thru several massive power ups since her 70's debut. She's been able to project energy blasts, use superhuman strength, fly, breathe in space, vastly expanded danger sense.
The Abdell/Lannet(?) GotG made her a telepath, which might have been the one power that her 80's (irrc) power up didn't give her.
Movie Mantis is like... Classic Mantis but where the human martial artist gimmick got taken out leaving her as an alien with a more powerful version of her empathy.