This is a general concept to give you the grand idea on the matter.
It is highly recommended that you modify and customize your Champion Points, Mundus Stone, Enchantments and Traits personally. You may also even use a different Monster Set or secondary Gear Set
MAGICKARace
High Elf, Dark Elf
Gear
Lokkestiiz + Twilight Remedy
Monster Set
Balorgh, Molag Kena, Slimecraw, Valkyn Skoria
Weapons
Lightning Staff + Restoration Staff
Rings and Necklace
USE HARMONY TRAITS on all jewlerry TO INCREASE SYNERGY EFFECTS BY 90%
Other Useful Gear Combinations
Wise Mage OR Master Architect OR Vicious Death
Brief Details
The Necromancer can activate their own synergy via
Avid Boneyard which is a D.O.T that offers a synergy, that deals additional damage when activated, that will also heal you for the damage done.
Necromancer Passives offer
Increased Phys/Spell Penetration, Increased Health, D.O.T Reduction, Increased Healing Recieved, Increased Critical Rating, and Resource Recovery, Cost Reduction Abilities. Racial Passives strengthen these Necromancer Passives.
Necromancer abilities consist of Healing via Damage and Summoning from corpses - as well as disease damage for the Stamina Aspect
Lokkestiiz -
Increased Damage by 5% toward Dungeon/Trial Monsters at all times.
Activating synergies grants you Major Slayer (15% damage increase) for 15 seconds.
Twilight Remedy -
Allies who activate your synergy will heal for 21k over 10 seconds, and gain Minor Force, increasing their Critical Damage by 10%. This includes you, as a Necromancer can activate their own Synergy via Avid Boneyard Ability
+ Magicka Recovery, Spell Damage, and 5% Damage Reduction from Dungeon/Trial Monsters at all times.
With these armour sets, (including the other combinations mentioned) we can increase our groups critical damage, and their spell/weapon damage. We also provide a very large healing synergy. We must also remind ourselves that Harmony Traits implemented to each ring and necklace boosts our Synergy strength by 90% altogether. We have A TON of things increasing damage by a large *percentage* value - both critical damage and base damage and we get stronger off our own abilities and kills.
Your Monster Set is important. Balorghs will substantially increase damage by up to 1000 for 10 seconds upon activating an Ultimate. Molag Kena offers 500 spell damage after 2 consecutive light attacks. And Slimecraw increases damage done by 8% at all times, plus some critical rating.
Mundus Stone choices generally involved increasing your Weapon/Spell Damage, Critical Damage, Penetration or perhaps Increased Magicka.
Enchantments are generally only Increased Magicka.
Traits would be Divines.
This way, we have over 35k Magicka with roughly 3k Spell Damage or more - not including Synergies and % buffs. Thus, activating these Synergies and % buffs will GREATLY enhance your 3000 Spell Damage to something much more but also increasing your allies damage, and healing them massively.
Yet, you are a DPS role. But you can grow into an 80k Tank. Or Resurrect 3 dead players. You're increasing everyones damage with your synergies, or healing them greatly with your synergies, or both! Or yourself! You can CRUSH mobs with Ultimates and AoE's.
Lastly, when we combine Reanimate abilities or Barrier and Warhorn Ultimates we massively support our group with big healing or big damage shields or greatly increased damage and instant revives. Bone Totem also increases the damage targets recieve as well as stunning them. Pummeling Goliath is excellent, too. Scyth Ability, and other healing and damage reduction abilities come together conveniently with this, making you versatile. The damage is very high and its all in the % values that you stack with Spell Damage found in gear, monster sets, champion points, mundus stone and your race. Enchantments and traits, potions.
This also benefits synergy bonuses you may get from OTHER players, obviously - such as A Sorcerer using the Storm Atronach Ultimate that grants 25% increased damage done. Remember you have Harmony Traits in all of this!
I hope you check this out and tinker around with it's potential. There is much more that can be done and these few notes are just the bigger highlights. Mixing and matching different skill lines and ultimates can significantly increase this builds potential.