During the last update prior to school buffs/nerfs. I saw that balance has been left out during the blade balancing, that adjusted every school blade to 35% while maintaining stats to determine the tiers in school damage identity. Balance, Death, Ice and Life share somewhat of similar damage, therefore its only right that balance blade got increased from 25% to 35% due to it already being bad in the first place. Tc blades could remain the same as it is at 30%, while buffing up blade storm from 20% to 25-30% for that extra pip on being an (aoe) spell.
This should be able to help balance on all general aspect and align their identity along with other schools.