[Hardcore Single Player] First time Pandemonium Event

Hello Community,

I am scared. Very scared. I play Hardcore exclusively and have never fought or even seen any of the Uber Bosses in the game.
I want to try, but I want to be prepared, so please bear with me and provide me with some tips if you can.

The character I am planning to take Ubers on with is a Sword

Whirlwind Barbarian, currently level 91.

My Gear is as follows:

Arreat's Face, socketed but socket is still empty.
Duress - in a

Dusk Shroud, 1237 Defense (I gather CB and Open Wounds are important here)

Death's Hand - Upgraded to

Demonhide Gloves (I figure these are nice vs.

Lilith?)

Death's Guard - Upgraded to

Demonhide Sash (Currently my only Source of Cannot be Frozen)

Gore Rider (More CB, Open Wounds)

Angelic Wings and

Angelic Halo, for the Attack Rating Bonus.
A rare Ring with 75 AR, 6% Mana Leech, 28% Light Res, some Fire Res and Poison dmg

Kingslayer in a

Champion Sword - nice CB, Open Wounds, -Target Defense
Unbending Will in an

Executioner Sword - Nothing special, I really want to replace it with an Oath, but the right base eludes me

Including my Charms, here are some relevant stats:
- About 3100 Life when buffed
- All Resistances are overcapped slightly, Poison by 25+
- 5 Frame Attacks using

Whirlwind, could go to 4 if I switch to my Treachery
- 87% FHR, just hitting the breakpoint
- Poison Length reduced by 75% for

Lilith
- 93% Chance to cause Open Wounds
- 63% Crushing Blow
- 15% Deadly Strike
- Roughly 12k Attack Rating with

Whirlwind
- Roughly 9k Attack Rating with

Double Swing

I deal about 700-1500 dmg with my mainhand and 750-1400 with my Offhand.

My Mercenary is a

Frenzy Barb with

Duriel's Shell, Lawbringer,

Lightsabre and

Crown of Thieves for some life leech, which I could replace with a GFace.

Is this a good enough setup?

I am not worried about Uber Izual or Uber Duriel actually, but

Lilith I am terrified of.
Chugging 10 minutes worth of Antidotes should get me to 85% Poison Res, being 65% over

Cap if that's even important.
The poison itself seems to be the lesser problem though, as I read she hits super hard physically, too.. can she one-tap me?

I also gather that before going to Uber Trist, if I make it past the Lesser Ubers, I should not face

Uber Mephisto without Lightning Absorb, lest I get one-tapped?
Also which of the Bosses do I need

Life Tap for, I read conflicting information about drain effectiveness.

Lastly, I have been thinking about leveling a Smiter Paladin to attempt Ubers with instead, as I read it's the "easiest".
What are your thoughts on that?

Any feedback is well appreciated