PoE RDeschain1, Spell builds

PoB: New Items from this League are highlighted below. Over the last few days I brainstormed the idea of an Impale Spellcaster with the new gloves Entropic Devastation. After trying out alot of different Passives Trees and Ascendancies in PoB, i ended up with Champion - for Perma Fortify, (basically) perma Adrenaline + Pain Attunement Synergy + Slayer Cull Through Flesh/Flame Jewels, Stun Immunity and some Aura buffs with Inspirational. Because Champion doesnt really have good access to Spell Crit, I use the new Sandstorm

I am playing an Eye of Winter Occultist and I honestly really enjoy it. But I mainly struggle with defenses on this character. I have reshuffled my Passive Tree a few times now. I tried Glancing Blows with a Life on Block Shield, but i had to sacrifice alot of Life to get the Block nodes. In terms of Main Links, I tried Pinpoint with Apex Mode Jewel, which was fine. I tried Badge of Brotherhood and ice Bite, but I didnt like losing Life on my Amulet and it just didnt feel right. Also I dont know how to keep up frenzy on bosses. Right now I am playing with Unleash and the three Unleash nodes