POE : Disintegrator Related. Physical Dmg Redux

Physical damage reduction:

• Endurance charges [up to 44% with this staff] (12% base + 12% notables + 4% Juggernaut + 4% corrupted belt implicit + 8% Kaom's Way + 4% Death's Door)
• Basalt flask [15%] with Alchemist's prefix [+3.75%], Pathfinder [up to +3.75%], Conqueror's Efficiency [+1.2%], Alchemist passive wheel [+3.9%], and Elder belt prefix [up to +1.5%]
• Help Oak [2%]
• Soul of Steel notable [4%]
• Pantheon powers: Lunaris [up to 8%], Solaris [6%], Tukohama [up to 8%], Gruthkul [up to 5%]
• Ascendancy passives: Guardian [1% per aura], Necromancer [1% per zombie], Ascendant [4% from Necromancer]
• Level 22 Summon Chaos Golem [5%] with helm enchant [+5%] and Primordial Eminence jewels [+1.5% each]
• STR-based body armour suffix [up to 4%]
• Elder shield suffix [up to 5%] (can't use with staff)
• Essence of Horror belt mod [5%]
• Longtooth Talisman [up to 6%] or Eyes of the Greatwolf [up to 12%]
• The Red Trail [10%]
• Watcher's Eye Determination mod [up to 8%]
• The new Gorgon's Gaze helmet [5%]

Reduced damage taken:

• Leo bench mod [5%] (can't apply to unique weapons)
• Pantheon powers: Arakaali [5%], Ralakesh [25%]
• Ascendancy passives: Gladiator [10%], Assassin [10%], Trickster [8%], Champion [6%], Berserker [6%], Ascendant [5% from Champion]

Less damage taken:

• Arctic Armour [13% at level 20] (only applies to hits)
• Storm Barrier [13% at level 20] (only applies to hits)
• Kintsugi [20%, but only if you haven't been hit recently, so quite impractical]

Damage is taken from Mana before Life:

• Mind over Matter [30%]
• Hierophant [10%]
• Cloak of Defiance or Shaper body armour prefix [up to 10%]
• The Aylardex [up to 9% with this staff] (3% base + 3% notables + 1% Ascendancy + 1% corrupted staff implicit + 1% amulet itself)
• Watcher's Eye Clarity mod [up to 10%]
• Corrupted helmet implicit [up to 5%]

Now, obviously, you can't use all or even most of these things at once, but clearly you have options. The list is probably far from exhaustive as well. Feel free to let me know what I've missed.