Leveling Skills and Support Gems
Early Game (Acts 1–4):

Glacial Cascade: Early on, Glacial Cascade is a fantastic tool for clearing packs of enemies. This skill also has Path of exile currency shatter explosions that help clean up groups when you freeze enemies, providing excellent AoE damage.
Support Gems: Concentrated Effect, Cold Penetration, Ice Bite.
Falling Thunder: For tougher enemies, Falling Thunder is your go-to. This skill slams the ground with massive AoE damage, and you can use Power Charges to increase its damage output significantly.
Support Gems: Power Charge On Critical, Concentrated Effect, Energy Leech.
Killing Palm: You can use this skill to execute enemies at low HP. If you want to POE currency for sale add a bit of utility, Killing Palm will also let you deal more single-target damage during your leveling process.