Nah, i will object to pitching it as Mera will be deemed not so special anymore. Maybe aside from what we mentioned, develop a single characteristic or a feature of one's flame may do. For example, Gambit may transpose his flame onto his weapon and keep it steady like an ember or fortified lava.That's how it was on WURP, @Ziosa can pitch in as well.
Uteki may lauch a rei gun like projectile.
In other words, just like Fire Force's abilities.