[Astral Harmony]

Ignite only ignites. The properties of what's being ignited determines the effects.

Alice already used Ignite once to light the cigarette she gave to Grevan. That's pretty much the gist of how Ignite works and what it can do.

If we're talking about using Ignite in a combat form, it's properties are extremely limited. Trying to kill someone with Ignite would be wildly ineffective, and the best tactic for using Ignite to kill someone that I can think of right now would be lighting the fuse of an old bomb or perhaps a molotov cocktail.

I don't really have any opinions myself on fighting opponents of my element or derived elements from my own. Just gotta figure it out when I encounter enemies like that.

...Just no joke elements, like the element of marshmallows.

Marshmallows are surprisingly effective, though. I died, like, twice in the Ghostbusters game for XBox 360 thanks to Stay Puff's minions.