Build:Pure Mage

Full Build Details
Skills can easily be swapped out to prepare for specific boss fights. Sigil of Wind can replace Fire/Ice, and for a mostly Frost fight, Mana Ward and Push Kick can be substituted for more Frost spells.

For Rune Sage, [Runic Prefix] is taken in order to get Decay damage on the Runic Claymore, as there is no form of Decay magic aside from the Blood Bullet.

For Philosopher, [Sigil of Ice] is taken over Fire Affinity, as without it, Frost damage will be severely lacking.

Lastly, for Cabal Hermit, [Sigil of Wind] is vital as it provides extreme amounts of Lightning damage and Impact with Conjure and Spark.