Need Minion Advice (Keeping Minions Alive)

I'm not sure if it's me or it's the rare changes but for the first time I can't keep my minions alive. I'm doing my own build so not following a guide, but my minions should be pretty tanky. I've done similar builds a few leagues ago and the minions lasted ok. I'm running an arakaali fang guardian. I run determination and purity of elements both level 21 skill gems I've got 69% aura effect +2 levels from helm corruption. (Lots of other auras but not relevant to minion tanking).
I've got some minion life passives (55%) Minion regen passive (1%)
I've annointed a stranglegasp with grave intentions for minion ES and minion chaos res.
I'd like to run animate guardian but it dies too quickly. I run carnage chieftains (3) they last longer but die 2-3 times per map. I run 8 zombies which I spend most of my time resummoning to keep them up. These minions are all supported with minion life, meat shield, and (being desperate) also life leech. I shouldn't need elemental army as I run a buffed purity of elements.
I'm running T14-16 maps (not ususally delirious), and also some beachheads & infused beachheads. Previously I've never had to resummon spectres/zombies or AG once I get skill gems to level 18/19.
Am I doing something wrong or is this the new normal?
Is there anything more I could do to help the minions tank?

Update: Testing with lvl 3 empower instead of life leech

Pick up the Decay Ward notable if you can. Excellent way to keep minions alive vs hordes of monsters, though might not save them vs big attacks or dots (which archnem monsters have in bulk...).

The Life from Death cluster jewel notable is also excellent for spammy builds. I've never used Arakaali's fang but it looks like it'd combo with it pretty darn well.

Thanks. Life from death looks like a good plan.

You clearly know your stuff OP so I'm sure it wont be long before you find a solution yourself.
I normally play zombies/skeles every league as Necro but I'm Herald of Agony this league so can't provide much insight.

I think Kaijyuu2's suggestions were very good as I've experimented with block on minions in past and it's huge similar to how Aegis Aurora is the gold standard for tanky endgame exiles.

I just PoB'd your character and saw your zombies have 25,500hp. I normally work with 60-70k HP zombies with 4k regen endgame so even with all your defenses it just looks too low from my perspective.
Dunno good luck though.

Thanks guys the empower + minion life on block pretty much solved it. Don't think the life from death will help now since nothing is dying (does spider despawn count?).

Ended up going with just spiders, reallocating a lot of passives out of minion life / defence and into minion damage. I just couldn't keep the AG alive for any endgame content (non-boss)