[GhengisRexx]

There is another rpg that addresses this with "trappings". So if your wizard has survival skill and needs a fire, (or water for that matter), the player makes the normal survival roll , but might achieve the results magically. Mechanically there is no change, but from an role playing standpoint, it's cool when the wizard (after making the survival roll) utters a word of power and "poof". Food and drink appear out of thin air.

This kind of mechanism can be creatively used with combat skills. A wizard with unarmed combat talent might have flaming fists to get the bonus damage. Staff mastery might cause the wizards staff to appear as a giant icicle, dripping pools of icy ground (representing any defensive bonus.)

The beauty of this is it adds flavor and rewards player creativity, but requires almost nothing from the GM.