How realistic is league starting Death's Oath in SSF?

Character Level 95 Occultist Bandit: Kill all Pantheon: The Brine King, Abberath
Pools 3,699 Life 589 Energy Shield 1,635 Mana
Defences 6,016 Armour 3,662 Evasion 75,684 effective HP
Resistances 80% Fire 80% Cold 80% Lightning 80% Chaos
Avoidance 75% Block 71% Spell Block
Full DPS 3.4M as set up in the creator's PoB
Weapon 1 The Grey Spire Judgement Staff
Helmet Vortex Horn Steel Circlet
Body Armour Death's Oath Astral Plate
Gloves Allelopathy Satin Gloves
Boots Morbid Spark Carnal Boots
Amulet Carnage Heart Onyx Amulet
Ring 1 Plague Nail Amethyst Ring
Ring 2 Rift Finger Amethyst Ring
Belt Soul Twine Heavy Belt
Flask 1 Seething Divine Life Flask of Sealing
Flask 2 Rumi's Concoction Granite Flask
Flask 3 Practitioner's Quicksilver Flask of the Curlew
Flask 4 Constant Sulphur Flask of Diverting
Flask 5 Analyst's Jade Flask of the Ibex
Unnatural Instinct Viridian Jewel
Maelstrom Shard Crimson Jewel
Oblivion Sliver Cobalt Jewel
Weapon 1 Swap Increased Area of Effect 20
Weapon 1 Swap More Duration 20
Helmet Despair 20/20 Eldritch Blasphemy 3/20 Temporal Chains 20 Herald of Ash 20
Body Armour Efficacy 20/20
Body Armour Void Manipulation 20/20
Body Armour Lifetap 20 Less Duration 20
Body Armour Swift Affliction 20/20 Concentrated Effect 20/20
Boots Flame Dash 20 Lifetap 1/20 Withering Step 20
Boots Malevolence 20
Gloves Efficacy 20/20 Void Manipulation 20/20 Swift Affliction 20/20 Infused Channelling 20/23
Death's Oath Death Aura 20
Allelopathy Blight 25