Kuva weapon questions

I have a question too all about kuva weapons.

My first kuva weapon is kuva zarr and god be good it's disturbing how much damage it does. It's currently my favourite weapon in the game... The thing is whenever I search for best kuva weapon everything takes me to the same conclusion kuva nukor... Well I get it it's good but for now I'll hang on with my furis incarnon and dual toxocyst..

So I have a question to all what is the next best primary and secondary kuva weapon of your choice and what should I go for the next?