I would say Idie wins because when Pyro creates flames, she can just cancel them out with her ability to "rechannel temperature," meaning she utilizes the presence of heat to create cold, especially ice. (This power also works vice versa, but that most likely wouldn't be helpful in this battle situation)
Oyas like 15. Whys she lookin like Storm in that pic? Anyways, Akash has a point. Pyro is simply stronger at his one power and has far more xp than Oya although she has more versitality. It can go either way.
@Anotherbatmanfan You are correct. That was a horrible outfit. 🤮 😑 About as bad as Meggan's purple "goblin princess" outfit in Excalibur. 😖🤢However, Sue was older than fourteen.