These are the recommended end-game skills for a Magicka Warden. Recommended Gear, Traits, Enchants and CP are further down in our guide.
If you need help or have any questions don't hesitate to ask in the discussion channel!

Potions: This build doesn't require specific potions.
Food: Ghastly Eye Bowl or Solitude Salmon-Millet Soup if you need health.

Rotation:
- Apply all DOTs (Damage Over Time skills) and buffs
- Every 6th ability, cast Subterranean Assault
- Any time all DOTs are ticking use Screaming Cliff Racer as your spammable
- Whenever a DOT or buff falls off, reapply it. Prioritize Blue Betty, Lotus Blossom and Barbed Trap.
- Cast Wild Guardian when a boss reaches 25% health.

Your rotation will basically look like:
Skill 1 --> S2 --> S3 --> S4 --> S5 --> Sub Assault, repeat

Flex options:
If you need additional protection, replace Deadly Cloak with one of these skills: Arctic Blast or Ice Fortress.
Your survivability should already be great on MagDen as is, because Lotus Blossom heals you, so this will rarely be needed. Using these flex skills also means your damage is lower.

Weapon choices:
This build runs Dual Daggers on the front bar and an Inferno Staff on the back. Don't want to dual wield? Use a flame staff on the front bar. Don't want to use a staff? Swap to a Greatsword and make these changes:
Unstable Wall --> Stampede
Scalding Rune --> Carve (Or a flex skill)