" You are so trusting, so convinced of the purity of Toa. I don’t think Nidhiki even trusts himself. Better keep an eye on him, Lhikan, he’ll come to no good. "
— Tuyet, The Many Deaths of Toa Tuyet
About the armor, I used the visorakh paws for two reasons: it adds an insectoid characteristic to the armor and its stripes match those of the bohrok shield, including the direction of the stripes.
One thing I noticed when working on my own Nidhiki is that the large Piraka foot (which comes in Dark Green) has a very similar pattern to the Bohrok shield:
Of course, I ran into an issue where using this part made him look a bit chunky, but maybe you can figure something out that I couldn’t.