KB Frag with MB and Nimis tips

Pobb.in I am wondering what my next steps could be for either increasing my survivability (preferred) or drastically increasing my damage.

I am unsure how to gear for the helmet slot if I got rid of the timeless jewel and not sure what other uniques are safe to remove without breaking the synergies. The Timeless jewel currently gives almost 50% damage.

Any tips or suggestions on where to take this build? I am also open to other build ideas with Nimis and mageblood.