Evasion (related to dexterity) is another way to PoE Currency avoid damage -- it is chiefly employed by ranged characters that do not expect being struck a lot. Combined with Acrobatics keystone in the Passive skill tree, evasion gives you fairly high opportunity to avoid taking any damage in any way, but it is one of the most unreliable defensive mechanics (because few unlucky hits can take out you instantly) -- that is why it's much less hot in hardcore.

Energy shield (associated with intellect ) is a defensive mechanism which has been meta until 3.0. Depended upon it. Combine that with Granite Flask and Basalt Flask and you have a good quantity of armour with large hp that is effective. On top of that plenty of builds used Vaal Pact keystone in combination with life leech which made these figures able to facetank even the greatest hits and recover whole hp within a very short amount of time.

There are more ways to avoid damage -- block (your personality blocks incoming attack and does not take harm from it), dodge/spell dodge (allows you to dodge attacks and spells similarly to evasion) -- those are usually utilized as additional layers of protection along with one of those earlier mentioned defense mechanisms.

Estimated physical harm reduction this stat tells you just how much physical harm you're mitigating. The stat could be boosted by certain items, Basalt and PoE exalted orb Granite flasks charges and several other options.
PoE Currency https://www.mmoexp.com/Path-of-exile/Poe-currency.html