Changes

What sand mages lack in raw power, they make up for in reliability. This reliability is a consequence of their taking the concept of "death of a thousand cuts" to extreme and literal heights by attacking primarily with sand. Getting hit with a single grain of sand technically hurts, but it's so insignificant that you'll hardly notice (unless you're hit in a sensitive place, such as an eye, in which case taking a grain of sand to the eye is still preferable to taking a dagger to the eye). Getting hit by several thousand grains of sand in quick succession can tear a person to shreds. What this all boils down to is that sand mages can deal lots of damage just by hitting thousands of times with a single attack. But because they rely on quantity rather than quality, their attacks can be easily resisted; just having good armor and/or reflexes means a potential victim takes fewer hits, and because each hit is so weak, damage reduction severely hinders a wind sand mage's offense. But with enough sand at their disposal, they can easily work around this drawback.