To explain: HOLY is dispel evil, but preferably hammer of faith. PRESSURE is shockwave. COLD is frost shards. FIRE is flamestrike (mob) and firestorm (room), and demonfire if you can use it. POISON LIGHTNING GOOD EVIL should be self explanatory. At least those are the ones we know.
I'll put them all below and break down per zone:
Alps:
Fosegrim, guardian of the waterfall is a saint.
Iona - Probably use fire spells (since charmies seem to use that vs. it)
Bloodstone:
An evil undead tree is prime evil itself. Weak against: FIRE Strong against: POISON PRESSURE
Evil exudes from the astral phantom's body. Weak against: HOLY Strong against: POISON
The guardian demon is prime evil itself. Strong against: FIRE
Evil exudes from a Shielag's body. Strong against: GOOD POISON
A drow sorceress is prime evil itself. Strong against: GOOD
the nightmare beast is prime evil itself.
The spirit of a maiden is prime evil itself. Strong against: GOOD POISON
Evil exudes from the Dragon Highlord's body. Strong against: PRESSURE
Azure, the ancient blue dragon is prime evil itself. Strong against: GOOD LIGHTNING
a Darkwood druid is neutral.
Evil exudes from a priestess of Lloth's body. Strong against: GOOD
A guardian genie is neutral. Strong against: FIRE PRESSURE
Vecna is prime evil itself. Weak against: FIRE HOLY Strong against: COLD ACID POISON PRESSURE [2.vecna]
An efreeti is neutral with tendencies toward evil. Strong against: FIRE
A Glabrezu is prime evil itself. Weak against: COLD Strong against: FIRE PRESSURE
The death knight is prime evil itself. Weak against: HOLY Strong against: GOOD COLD POISON
Coliseum:
Tenson, Physicon's apprentice is neutral with tendencies toward good. Strong against: EVIL POISON
Condemned:
Ixpah, the blood demon is prime evil itself. Strong against: FIRE
Demonforge:
Dhaulagiri, master guard of the Demonforge is a saint.
The youthful mage, Kamet is good.
Goodness exudes from Lhotse, healer of Demonforge's body. Strong against: EVIL
Den:
Thanos is neutral. Weak against: COLD HOLY Strong against: FIRE PRESSURE
NOTE DIFFERENT THANOSES ARE DIFFERENT, NEED TO UPDATE WHICH IS WHICH.
Eldricks
The undead corpse of Eldrick is a saint. Weak against: FIRE Strong against: EVIL COLD POISON HOLY
The spirit of Cecilia is a saint. Strong against: POISON HOLY
The spirit of Eldrick is a saint. Strong against: EVIL POISON HOLY
Elysium
A young adult golden dragon is a saint. Weak against: COLD Strong against: EVIL FIRE
Goodness exudes from Ezekiel's body. Strong against: EVIL HOLY PRESSURE (but since you're underwater, may as well use shockwave)
An ancient silver dragon is a saint. Weak against: FIRE Strong against: EVIL COLD
The ancient golden wyrm is a saint. Weak against: COLD Strong against: EVIL FIRE
A Ki-rin is a saint. Strong against: EVIL HOLY PRESSURE
Estate:
Count Van'Kyln is evil. Weak against: HOLY Strong against: GOOD FIRE COLD POISON
Kalata:
Eman Weak against: ACID Strong against: PRESSURE
Rashkal Weak against: HOLY
Kukdheuda:
Djavul, the leader of the ordogi demons is prime evil itself. Strong against: FIRE
Kukdheuda, the fallen God is neutral.
Lyryanoth:
Evil exudes from Lyrya Lan'y'nal's body. Weak against: COLD Strong against: GOOD ACID PRESSURE
The Visionary is a saint. Weak against: ACID Strong against: HOLY PRESSURE
Reclasta:
The Crystal Green Demon is neutral. Strong against: FIRE
The Crystal Red Demon is neutral.
The Crystal Blue Demon is neutral. Strong against: FIRE
The High Priest of Reclasta is a saint. Strong against: EVIL
Sevoseth:
The ghost of Fletching is neutral. Strong against: ACID POISON
The ghost of Shaft is neutral. Strong against: ACID POISON
The ghost of Asten the Archer is neutral. Weak against: FIRE COLD HOLY Strong against: ACID POISON
THG:
Rosco, the Vigilant is a saint. Strong against: EVIL
Riley Spencer, Defender of the Tusk is a saint. Strong against: EVIL
Niram, the bounty hunter is prime evil itself.
Karakoram is prime evil itself.
Tomb:
Apsu is a saint. Strong against: COLD
Undead:
Evil exudes from the Risen's body. Strong against: GOOD POISON
The necromancer, Ripithe is prime evil itself. Strong against: GOOD
Vondarkla:
The Mistress Vondarkla is prime evil itself. Strong against: GOOD POISON
Evil exudes from a phoenix rising's body. Weak against: COLD Strong against: GOOD FIRE
Thanks Damae