Old Endgame Armor?

I recently got the old endgame armor (blue mask, adamantite, crystal, and stalagmites.
But when i use the adamantite, all my elemental defense drops to around -80 to -120
so should i keep using the adamantite or use another chestplate?

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the adamantite gives good health regen so idk if should still use or not

 

Millennium is better imo :/

 

well uh

and

dont go together

 

Thats what I been told all my life.
;-;

 

Blue mask and crystal are still very good the other two are trash

 

stalagmites isnt trash .-.

 

Let me rephrase "not viable"

 

The old endgame set isn't endgame anymore (although Crystal and Blue Mask sometimes still show up in endgame builds). It's very weak when all four pieces are used together as they're all for very different builds.
Adamantite is super trash and isn't good for much of anything.
Stalagmites is okay, but is quite underwhelming for the standards of Legendary items.
Blue Mask should only be used if you can't use a build without more skill points, as it's a very weak helmet aside from the massive skill point boost.
Crystal is really good for mana regen and reflection.