For example, Fireball multiplier was x5. Now when you are level 60, damage multiplier becomes x11.
List of skills: Fireball, Lightning Bolt, Serpent, Luminance, Dark Eclipse, Fox, Tornado, Ice Shot, Shardstrike, Oblivion, Detonator, Totem, Effigy, Glacial Spiral, Spark, Sword Slash, Storm, Comet, Convergence, Firewall and Celestial Slam.
The skills include Fireball, Detonator, Eagle, Luminance, Oblivion, Shiruken and Lightning Bolt.
These new unique items and damage multiplier buffs might make these skills more viable.