Splitting rainbow and other questions

I am trying to use the splitting rainbow build with recursion and idk how to use it properly. Why is the recursion so strong people tell me ? Is this build still good after update ? Is there a better elemental build now, if so what weapons and stuff now ?

The Recursion with indiscriminate and ties that bind, coupled with an elemental projector and a driver com= Melting!!! It works after patch it’s just sometimes difficult to use the Recursion.