Armors have a hidden mechanic called armor type. Each base is either light/medium/heavy. You receive a speed penalty from heavier armor and it also drains more stamina:
Light Armor: 0% stamina drain and 0% speed penalty.
Medium Armor: +50% stamina drain and 5% speed penalty.
Heavy Armor: +100% stamina drain and 10% speed penalty.
These armors are light: dusk shroud, wyrmhide, scarab husk, wire fleece, great hauberk, archon plate.
Then it's about the reality of your strength. Choose the highest defense base of the strength you already cover. Dusk and Archon Plate are significantly more expensive than all others. If you wear Thundergod's, for example, you have 130 str anyway and can easily chose a Great Hauberk.
Also, you might want to consider style. Dusk looks a little poor on most characters, most Palas avoid it. Archon Plate (light) and Sacred Armor (medium) look great on a lot of characters. Check this:
https://i.redd.it/r41tjn4d7yy61.jpgThis post was edited by DrGoogle on Sep 19 2022 03:00am