When it comes to armor, you’ll want to focus on perks like Refreshing, Health, and those that enhance your weapon abilities, such as Empowering Whirling Blade or Refreshing Might Gavel. Other valuable perks include Grit Ward, Enchanted Ward, and Conditioning. Note that Refreshing can only be used on four gear pieces now, so don’t overstack it.
If you’re not keen on farming, the 675 Alliance/Faction Gear is a good starting point with decent perks.
The Woodgrain Set is an easy to farm potential 700 gearscore set which drops in Edengrove from all enemies in the Malevolence Elite Area, but an easy boss to get it from is Baines.
To get closer to Best in Slot, consider the Keratin set, which includes Magnify, Grit Ward, Refreshing, and one other perk. This set works well for active tanks who invest heavily in Constitution for Grit. You can obtain it by defeating bosses in Brimstone Sands in the Heli Elite area or Kepri.
Another strong set is the Azoth Crystal set, offering Refreshing and Enchanted Ward. It’s obtained from all expedition bosses, but it only drops on Mutation 2 or 3 or can be crafted at the Gypsum Kiln.
You can also explore conditioning sets for damage reduction against specific damage types. If you opt for this route, consider:
Artifact options for tanks are limited, with the Void Darkplate being one of the better choices. It provides 20% increased armor, enchanted ward, and physical aversion. Pair it with generic perks like Health or Elemental Aversion to complement your build. Attuned Leather Pants can also be an option as they add a lot of extra attributes to your build, and Nimble Coat may also have some uses.