For the correct Spell Ranks: Be sure to keep these spells at max rank — Power Word: Fortitude IconPower Word: Fortitude, Shadow Word: Pain IconShadow Word: Pain, Power Word: Shield IconPower Word: Shield, Renew IconRenew, Mind Blast IconMind Blast, Inner Fire IconInner Fire, Mind Flay IconMind Flay, Psychic Scream IconPsychic Scream, Devouring Plague IconDevouring Plague, Flash Heal IconFlash Heal, Divine Spirit IconDivine Spirit, Vampiric Touch IconVampiric Touch, Shadow Word: Death IconShadow Word: Death.
Smite IconSmite — Do not train this past rank 3 as you will stop using it after that.
Holy Fire IconHoly Fire — Do not train this past rank 4 as you will stop using it after that.
Psychic Scream IconPsychic Scream — You can delay upgrading this if you are low on money, but eventually you will want to learn higher ranks.
Dispel Magic IconDispel Magic — You only really need 1 rank of this spell; train the second rank when you have the money to spare.
These spells only have 1 rank and should be trained as soon as possible — Fade IconFade, Cure Disease IconCure Disease, Fear Ward IconFear Ward, Abolish Disease IconAbolish Disease, Levitate IconLevitate, Shadowfiend IconShadowfiend.
Save your gold instead of training these spells — Lesser Heal IconLesser Heal, Resurrection IconResurrection, Heal IconHeal, Holy Nova IconHoly Nova, Mind Soothe IconMind Soothe, Shackle Undead IconShackle Undead, Mind Vision IconMind Vision, Mana Burn IconMana Burn, Mind Control IconMind Control, Prayer of Healing IconPrayer of Healing, Shadow Protection IconShadow Protection, Greater Heal IconGreater Heal, Prayer of Fortitude IconPrayer of Fortitude, Prayer of Shadow Protection IconPrayer of Shadow Protection, Prayer of Spirit IconPrayer of Spirit, Binding Heal IconBinding Heal, Prayer of Mending IconPrayer of Mending, Mass Dispel IconMass Dispel, Mind Sear IconMind Sear.