Imo best thing is to replace the old ones . After I calculate some stats I can say is way better to do that.

And I want a mod to clarify how this calculation of adds up is done.

I did hundreds of tests and couldn t find one.

I got down all equips with a certain stat ( let s say life) and keep the life nature bonus on others and ....

Surprise !!!

Even if I had no life attribute on ninja tools left but just 30% life I still got life bonus from that procent :)))

Or any explanation how Ninja tools system works. Like at charm system we got explanations. At ninja tools would be required too. A complete set of explanations about Five Natures Stones and how to use them, how they affect the stats , additional attributes, strengthen and everything in details .

Not just a simple explanation. Like charm systems I would agree with only laborious explanation. Every fuction and the system behind it bcause for myself it looks like a broken system after I dig into some tests. An error of coding, a misunderstanding concept of ninja tools and a bad appliances of that 30% (simple or *ulate). All those thnks I observed and is clearly broken or intentionally rigged.