Making Demonic pacts relic hunter (t3) armour set

Making Demonic pacts relic hunter (t3) armour set in OSRS: 1 × Demonic hood (t3), 1 × Demonic robe top (t3), 1 × Demonic robe bottom (t3), 1 × Demonic boots (t3) → 1 × Demonic pacts relic hunter (t3) armour set. Profit right now: +746,110 gp after GE tax (input cost 2,977,890 gp).