MemeDankExtra from PC/NA helps us showcase the damage potential of PvE Magicka Templar damage dealers in The Elder Scrolls Online.
Recommended race for this build is Khajiit. Altmer is an alternative choice. Khajiit and Altmer are very close, either one is fine, Khajiit is nice because of their racial passives that offer extra Health and stat Recovery.
Recommended Mundus Stone is The Thief.
Recommended potions for this build will be Essence of Spell Power. Meme used Breach Potions to get more sustain by being afflicted with a negative Status Effect to gain the benefits of the Champion Point Slottable, Sustained by Suffering. He does not recommend using this potion in actual raids for obvious reasons. If you're getting Major Sorcery from a Dragonknight using Igneous Weapons and have Inner Light double barred you can run Heroism Potions for more ultimate gain.
Recommended food for this build is Ghastly Eye Bowl or any bi-stat food (Health + Magicka) for content that requires you to do so. You can also do Clockwork Citrus Filet or Witchmother's Potent Brew if need be.