Pohx’s RF Build Help

I’m really struggling to get my build going further. I cannot do T17 and often using multiple portals on T16 Jungle Valley. I’m farming harbingers and loving it but I think both damage and survivability are below what I need to go further. I’m at a loss for what to do so really looking for tangible next steps I can work on. Thank you! https://www.pathofexile.com/account/view-profile/SirRupertt/characters (Don’t have my POB because I’m on my phone atm)

I appreciate your help in advance :)