Boneshatter Smith Survivability

Just curious what general strategies people are using for survivability. I went through campaign stupid fast, but have hit a bit of a wall soloing t13 maps. Have failed sekhemas a bunch of times with all relics giving honor resist. Taking almost no hits is proving very difficult with basically no ranged attacks and having to get up close to mobs to prime for stun.

I still need 3rd and 4th ascendancy. I have about 3k life, 76% armour and lots of res. Chaos res is still low, and I was planning to get the “armour applies to chaos damage” to mitigate that. A lot of the top DPS builds on poe2.ninja don’t seem realistic with a lot of focus on fire damage but very little armour. I can post my build later if need be, but thought people might be going a different direction than I have been.