POE[3.21] Dialla's Malefaction Flicker strike? How does it work

Character Level 96 Berserker Bandit: Kill all
Pools 3,973 Life 189 Energy Shield 882 Mana
Defences 5,629 Armour 18,413 effective HP
Resistances 76% Fire 75% Cold 75% Lightning -25% Chaos
Weapon 1 Vengeance Spawn Despot Axe
Helmet Abyssus Ezomyte Burgonet
Body Armour Dialla's Malefaction Sage's Robe
Gloves Corruption Paw Slink Gloves
Boots Dawnstrider Vaal Greaves
Amulet Carnage Heart Onyx Amulet
Ring 1 Plague Circle Two-Stone Ring
Ring 2 Grim Grip Two-Stone Ring
Belt Soulthirst Cloth Belt
Flask 1 Progenesis Amethyst Flask
Flask 2 Bottled Faith Sulphur Flask
Flask 3 Examiner's Diamond Flask of Rupturing
Flask 4 Lion's Roar Granite Flask
Flask 5 Frightened Divine Life Flask of Alleviation
Armageddon Essence Crimson Jewel
Watcher's Eye Prismatic Jewel
Thread of Hope Crimson Jewel
Cataclysm Scar Large Cluster Jewel
Fulgent Glimmer Medium Cluster Jewel
Forbidden Flame Crimson Jewel
Forbidden Flesh Cobalt Jewel
Cataclysm Stone Large Cluster Jewel
Honour Shard Small Cluster Jewel
Weapon 1 Swap Hydrosphere 1
Weapon 1 Vaal Flicker Strike 20/20 Increased Critical Strikes 21/20 Awakened Melee Physical Damage 5 Close Combat 20 Awakened Multistrike 3/20 Ruthless 20/23
Gloves Assassin's Mark 20 Mark On Hit 20
Gloves Less Duration 20
Gloves Precision 2
Boots Purity of Elements 21 Enlighten 4/20 Herald of Ash 20 Pride 21
Body Armour Blood Rage 18/20 Multiple Totems 2 Berserk 20/23 Ancestral Protector 20/20 Steelskin 18/20 Enhance 4
Weapon 2 Swap Empower 2
Helmet Frenzy 20
Helmet Vaal Ancestral Warchief 20 Dread Banner 21/20 Leap Slam 6
Corruption Paw Aspect of the Cat 20 Mark On Hit 20 Less Duration 20