I am not one to say you shouldn't use a character just because another character is better at this specific skill.
Of course elves are better at magic... But why does that mean giants are restricted to melee? Thats not fair, let people play the way they want too.. People make melee elves a mage giants KNOWING they are weaker, the point is, they dont give a
.. they are doing what they want.
My advice is really no better, find equips, rank magic skills that give you a lot of mp like your magic mastery an your meditation, yes i think some bolts give you extra mp as well.
I would invest in the herbalism/pot making life skills, seeing as buying MP pots for your character will be way too much cash to be spitting out, an you can't depend on dungeons, or mp30's for a mage character.. You will especially need them since your characters total mp will not come close to an elves or humans