[Snake]

If Evoker is ever getting any elemental shredding, it should be tied to performing elemental combinations with invocations. For example:

Ice + Fire = Lightning Weakness. Ice is melted by the fire, leaving the target wet.
Earth + Lightning = Wind Weakness. Lightning surgically splatters the lingering earth, creating dust particles that can be pelted with wind.
Fire + Lightning = Earth Weakness. Intensified magnetic field makes them easy to be crushed by earth magic.
Wind + Earth = Ice Weakness. Expose the enemy's blood to icy winds after using cuts from wind, and bruises from earth.
Lightning + Wind = Fire Weakness. I ran out of creativity.

Of course, Intensify Cold will need to be changed in some way if this idea goes through. But it's one way to have at it at least.