...Hmmm... Nice mod, I really like the idea of it and the weapons look great. The crafting is kinda funky, but that's fine because it really isn't a bad thing. I was hoping that maybe you could make it so when you use the mod you can jump like 3 blocks, and run faster or climb walls or something. I apologize if this was already requested but I just thought it would really make you feel like a real ninja. Cool mod anyway and keep up the good work!
Edit: Or maybe you could make it so the ninja armor gives you those abilities.