Hello.
The best equips you can use in Fire Library as a druid is.
Book - Umbral Master Spellbook or Book of Lies with Fire Imbue. (Pref Umbral).
Rod - Cobra Rod - Critical DMG and Void.
Helmet - Falcon Circlet with Void/ML.
Armor - Dream shroud with fire protection.
Legs - Magma Legs or Gnome Legs.
Boots - Pair of Dreamwalkers.
Amulet - Magma Amulet ALWAYS.
Arrow slot: Moon Mirror.
Probably you will hunting using Utamo vita because you dont have Hit Points to tank much damage from Rage Squid and Burning Book.
Charms - .
Guardian Of Tales - Poison Charm
Rage Squid - Curse Or Zap
Burning Book - Freeze Charm,because you do more damage and they have more HP than Rage Squids.
Ink Blob - Enflame.