Technically it wouldn't nuking. I would be in favor of making blizzard and water sub skills just so red mage can have them for small extra damage against enemies. This way red mage also has an "elementalist" touch to it because it could exploit all elemental weaknesses. IF we had a free cast system they could merely throw in these spells for extra damage. It wouldn't make them OP either especially considering lower base melee damage and lower base spell damage. Make it a point to combine the two for higher damage.