What I've seen is that there are now Ninja tools which level requirements are 70 and or 80+. Those have better main stats aswell as sub stats. However, the colours of those seem to differ, some are just plain gold, some are gold/red and so on.

So you're saying only things like dagger, scroll etc. have higher level requirements? Would make sense since they unlock at those levels. Guess I kind of got it wrong then :D