Team Jeff!
It had to be a given that these things would not be pushovers; they weren't hunting deer or rabbit or even just bears. These things were from something possibly worse than Marrowood was, the way they leaked in and sought to destroy, they had to be worse.
Emma wasn't okay with sacrifice at all; not Snow, not Hook, sure as hell not Jefferson, and she had no plans to die today. She had a mountain of yelling to do at people and she wasn't even finished planning it out in her head yet.
She highly doubted that bullets would work if the arrow through the face didn't work, but she could maybe slow it down, distract it, enough that Hook or Snow could really get the thing dead. Stepping closer still to Jefferson, just in case, Emma concentrated her magic like she had in the cemetery all those weeks, months ago, and pushed it out and hot, imagining the flames as she willed the magic to work.
As the beast caught fire, Emma trying to force it hotter and further, it slowed slightly with a shrill roar, wavering on it's feet while on it's path towards them. "I'll try and keep it distracted, brain or heart, try and find it." That was how you went about killing evil demon things, right?