Hey there @xnnxphxse1! One option would be that if the outfits themselves have the Niagara systems already attached and maybe a bool to change variables in the the systems to fire or not. This way you can control the system on the fly, don’t have to repeatedly spawn and destroy them etc.
Quick tutorial on using Niagara parameters:
Quick example I put together for someone trying to only start spawning particles while a button was held. (also changes the color of the particles):
Let me know if you have any questions!