New Player - Need Help with defense options for ssf slayer

This is my first time getting to maps. I am playing as a SSF slayer and right now I am starting to have some problems with my defenses.

I am doing tier 9 maps and some special/unique mobs and bosses 1 taps me. Any tips/tricks for a new player? My build is below and I appreciate any input.

https://pobb.in/83MpCsOzW4pJ

Cheers,