But apparently she's been kitted out with steel pellets and put on crowd control duties for the pending battle? I'm having a hard time parsing how steel pellets lend themselves to anything other than putting tiny holes in people's bodies. Then again, Taylor is putting them up against a crew of enemy capes that has 3-4 members at minimum and (depending on how exactly the patches work) dozens at maximum, so perhaps the plan does indeed rely on Pelter putting holes in legs/shoulders/whatever until the enemies stop moving, lest they get dragged down by a mob of pseudo-capes.
Finally, I think the good guys should sit down and really think about the pros/cons of removing Dose (the chem Tinker) from the playing field, even if it requires drastic measures (like maiming him so he can't Tinker, or even assassinating him if no other plan will work). They really have to take into consideration how much damage the guy's patches are doing to the city. From the way the Merchants appear to be handing the things out like candy, it's all too likely that at least a few of their more unstable/inebriated gang members have used a patch, walked into an apartment complex or something, and just turned the place into an abattoir.
Killing is wrong, yeah, but unless Taylor can come up with some other way to stop Dose it could be argued that she kinda has an ethical obligation to forcefully stop him from causing the amount of harm that he currently (possibly) is. Both in the sense that she's a hero and in the sense that she's one of the few people in a position to stop the guy who's directly responsible for spreading around so much suffering to other people.
Then again she's just a kid, so the whole "obligation" argument loses a lot of the weight it might otherwise have. Especially if carrying out such a violent plan messes with her head so much that she goes on to do less good in the future.