You want to aim for these skills, but the order you slot them is totally a personal preference. For the back bar we are using a selection of AoE and DoT skills with a Lightning Staff. There will be alternative skills that you can switch.
Radianting Regeneration: Regeneration Morph. Weapon section, Restoration Staff tree. This is a direct heal skill that acts like an AoE, automatically hitting people around you. DPS doesn’t want to stack? No problem!
Healing Springs: Grand Healing morph: Weapon section, Restoration Staff tree. Just a great AoE heal that also gives you resources back anytime anyone is healed.
Energy Orb: Necrotic Orb morph: Guild section, Undaunted Guild tree. Always have this active during a fight, it will help your team sustain a lot, plus heal them.
Combat Prayer: Blessing of Protection morph: Weapon section, Restoration Staff tree. One of the best healing skills there is, not only it heals your allies, it also grants them a damage and resistance buff.
Enduring Undeath: Life amid Death morph: Class section, Living Death tree. This is a crazy heal over time and AoE heal that can last for at least 25 seconds.
Renewing Animation (Ultimate): Reanimate morph: Class section, Living Death tree. It allows you to revive up to 3 allies just by pressing a button. For sure one of the best ultimates for trials and dungeons.
Elemental Blockade (Blockade of Storms): Wall of Elements morph: Weapon section, Destruction Staff tree. This is a fantastic DoT and works great with a Necromancer. Lightning Staff with the Ancient Knowledge passive increases your AoE damage, and the class has the Rapid Rot passive, also increasing your AoE damage. Healer in this game is not just for healing, but also for damaging too.
Elemental Drain: Weakness to Elements morph: Weapon section, Destruction Staff tree. Fantastic skill for healers, it debuffs enemies and gives you magicka back to you and your allies.
Necrotic Potency: Bitter Harvest Morph, Class section, Bone Tyrant tree. This is fantastic. It heals you, but mostly important, it gives you ultimate when you activate this ability to consume corpses. So if there’s an add pull, it will almost guarantee you have your ultimate ready for the next boss battle.
Intensive Mender: Spirit Mender Morph, Class section, Living Death tree. This spawns a little ghost that follows you around and heals you or the ally with the lowest health around you. Great to have, activate it on cooldown.
Unnerving Boneyard: Boneyard Morph, Class section, Grave Lord tree. This will apply Major Breach to enemies, just like Elemental Drain, but in an AoE fashion, and also damage, especially if you consume a corpse on activation, and on top of that you ally can activate a synergy to do more damage and also heal them.
Glacial Colossus (Ultimate): Frozen Colossus Morph. Class section, Grave Lord Tree. It has low cost, does tons of damage, and applies Major Vulnerability to enemies.
If you want to be, or already are, a more advanced Necromancer player, you can switch some skills. You can take down Radiant Regeneration and Enduring Undeath, and put on Resistant Flesh, and Expunge and Modify (both are in the Living Death tree). The first one will heal and buff one of your allies, but debuff you in return, so you can use Expunge and Modify, which will remove two debuffs from you and restore Magicka and Stamina for every negative effect removed. These two skills paired with the Salve of Renewal CP Star will make you put down an AoE heal whenever you cleanse yourself or allies from debuffs. You can also switch the Glacial Colossus for Pestilent Colossus, trading the stun from Glacial for damage from Pestilent, or switch it for War Horn, an Assault skill that increases everyone’s critical damage and resources recovery.
Class: All Grave Lord passives. All Bone Tyrant passives. All Living Death passives.
Weapon: All Destruction and Restoration Staff Passives.
Armor: All Light Armor passives.
Racial: All Racial passives.
Guild: All Undaunted Passives.
Craft: Medicinal Use from the Alchemy tree.