Several "solid" guides for 100% completion highlight these specific steps for unique followers:

Learn the specific effects of the Relics found during crusades; they often provide the game-breaking power needed for the harder Purgatory levels.

Prioritize your Demonic Summoning Circle . At Tier 2, you can bring two demons into crusades, which acts as a major force multiplier. 4. Collection Checklist To fully "platinum" the game, you'll need:

You must obtain the Necklace of Light and Necklace of Darkness from the Mystic Seller. Give them to followers and sacrifice those followers to summon these legendary brothers. Later, turn them into demons to reunite them with their mother, Forneus.