Boot or glove enchantments for the caster?
Solution 1:
For gloves, the only usable magician boost you can enchant onto your gloves is a Magicka enchantment. For boots, there are no enchantments that are useful for casters. For a full list of possible enchantments, look here
Solution 2:
This handy table is taken from the UESP:
As you can see, there is nothing to improve casting ability for the Arms or Feet slots. Magicka on your arms slot is one option, and I'd recommend the ever-useful "Fortify Carry Capacity" for your boots.