Posterized black/white print on black hoodie

I’ve created a design in Photoshop for me and my friends which will include this deer skull. I’m gonna ask a friend who works with digital art to improve the design to make it less pixelated, make the shaded sections more coherent etc. But I’m not sure how it will look printed on a black premium hoodie. Particularly the horns which currently has no white outline, I could add a thin outline but don’t want it to look cartoony either. Would a thin outline be useful? How does black on black look with Spreadshirts printing method? Would it look better if the shading was not completely black, like the horns in my sketch?

Thanks in advance!