3.12 Looking for advice Spell slinger flamewall + blazing salvo

I am trying to think up a build using these new skills. I have been going thru the game right now just using Power Siphon to trigger flame wall and blazing salvo overall acts 1-9 have been easy just getting into 10.

But things I'm not sure on its survivability and how to scale its damage well into late game.

I was leaning towards going CI but still debating on that. Looking for input from anyone down for the challenge of helping build this out.