This is a pretty easy-to-use build for open world PvE or dungeons/trials with high DPS.

Gear:

5x Julianos (chest, belt, legs, gloves, boots) - All divines, magicka enchantments
2x Molag Kena (head and shoulders) - Preferably all divines, magicka enchantments

3x Willpower (necklace and rings) - Preferably all Arcane, spell damage enchantments

1x Lightning staff on front bar - Precise, weapon damage enchantment
2x Torug's Pact swords on back bar - Precise, weapon damage + shock enchantment

Skills on Overload bar: Power Surge, Hardened Ward, Mages Wrath, Inner Light, Bound Aegis

Basic tips:
- Keep Bound Aegis on at all times.
- Try to keep Power Surge up as much as possible. Since this is a crit-based build, Surge will be your main source of self-healing.
- The focus here is to max out total magicka, spell damage, and spell crit.
- Destruction staff abilities restore magicka whenever an enemy dies. Spam these AoE skills on mobs.
- If you run out of magicka during a boss fight, switch to back bar, hit surge, and overload the crap out of the boss.