Necromancer
20 - Grim Spellbinder (Pet: Undead warlock)
20 - Nylph's Bone Form (Illusion)
21 - Favor of the Fallen (GroupBuff: +Power, +Magic Resist, Noxious Resist, and +hp to pets)
22 - Blight (AoE Disease DoT)
22 - Party See Invisibility (GroupBuff: See invis)
23 - Swarm of Rats (Summoners # rats that attack targeted mob)
23 - Unliving Eyes (GroupBuff: See invis + EB)
24 - Undying Adherent (Pet: Undead Fighter)
25 - Boon of the LIfeless (PetBuff: Increase Offensive and Defensive capabilities of pet)
25 - Grisly Mark (Debuff: -Stamina, -wisdom, drains power from enemy)
26 - Mark of the Miasmic (GroupBuff: +stamina, +intelligence, +disease resist)
27 - Bloody Ritual (Drains life from pet and converts to Necro Power over Time)
28 - Grisly Brace (Buff?: Augmentation which absorbs trauma and noxious damage)
28 - Mend Bones (Transfers health from Necro to pet)
29 - Pestilential Blast (Disease DD, +chance to reduce noxious resist with each successful attack by an ally)
30 - Breath of the Unearthed (AoE Disease DoT +lifetap)
30 - Grasping Bones (Stun +short duration pet increase dmg)
30 - Nylph's Flayed Form (Illusion)
31 - Withering Affliction (Disease DoT, -strength, -agility)
32 - Cloak of Venril (TargetBuff: Invis +lifetap if attacked
32 - Shadowy Stalker (Pet: Assassin)
33 - Chains of Torment (Root + disease DoT)
33 - Dark Heart (Summons a bauble which restores power over time at cost of health)
34 - Grim Thulian (Pet: Warlock)
35 - Ghastly Stench (Disease DoT, -noxious resist)
35 - Nylph's Ghostly Visage (Illusion)
35 - Unholy Covenant (GroupBuff: +power, +magic & noxious resist, +health for pets)
36 - Locust Swarm (AoE disease DoT, +targeted mob additional disease DoT)
37 - Plague of Rats (Summons pack of plague rats to fight target)
38 - Rotting Thrall (Mez, cannot be interrupted or fizzle)
38 - Terror (Fear, maintaining spell drains power and immobilizes necromancer)
39 - Horrific Mark (Impairment: -stamina, -wisdom, drains power *If target dies while afflicted, Essence of Anguish is granted)
39 - Words of the Wicked (PetBuff: +lifetap proc, +aggro)
40 - Dartain's Dead Sight (Shows heat profile of all living creatures in view)
40 - Rending Frenzy (PetBuff: +dmg, Grants epcial ability to counterattack)
40 - Teachings of the Dead (GroupBuff: +stamina, +intelligence, +disease resist, +proc lifetap)
41 - Devour Health (Converts pet health to necromancer power over time)
42 - Grisly Stele (Augmentation which absorbs trauma and noxious dmg)
42 - Necrotic Mending (Transfer health over time from necromancer to pet)
43 - Deathly Pallor (Feigh Death, pets are banished)
43 - Skinrot (DD, +chance -noxious resist)
44 - Accursed Cloud (AoE Disease DoT, replenishes health of Necromancer)
44 - Convulse (Stun, +pet increase damage)
45 - Siphon Life (Lifetap)
45 - Nylph's Skeletal Regiment (Group illusion)
45 - Death's Coil (Disease DoT, -strength, -agility)
46 - Fade (Invis, when broken lifetap attacker)
46 - Shadowy Assassin (Pet: Shadow Assassin)
47 - Eternal Bindings (Root, +Disease DoT)
47 - Sacrificial Heart (Summons a bauble, which restores power over time at cost of health)
48 - Grim Terror (Pet: Warlock)
48 - Revivication (Non combat rez requires an Essence of Anguish*)
49 - Aspect of Undead (GroupBuff: +power, +magic * noxious resist, +health to pets)
49 - Stench of the Grave (Disease DoT, -noxious resist)
50 - Dartain's Cloaking Debris (Encases the Necromancer in swirling debris)
50 - Lich (Converts health to power over time)
50 - Torrential Plague (AoE Disease DD, +Disease DoT to targeted)

I did not write this information. I do not claim to be the source of such information.