Hey here's a small balance suggestion list I wrote a bit earlier, thought I'd throw it in here for you.
Searing Bond 15% reduced damage from lvl 1-15. Totem life increased by 15% to compensate.
Flameblast 25% reduced damage across all levels.
Arc 10% reduced damage across all levels.
Ethereal Knives 1-2% projectile speed per level.
Detonate Dead 20% reduced damage.
Lightning Strike: Now grants an additional projectile at level 6 and 15.
Sweep: Damage effectiveness increased from 75% to 90%.
Spark: Duration increased by 33%.
Righteous Fire: Damage decreased by 15%, area of effect increased by 10%.
Power Siphon: Damage effectiveness decreased from 125% to 110%.
Ball lightning: Damage effectiveness increased from 30% to 50% also increased projectile speed by 20%.
Freezing Pulse: Damage increased by 10% across all levels.
Elemental Hit: mana cost reduced by 20% at all levels.
Ranged Attack Totem: Attacks cast by totem decreased 30% less cast speed to 15% less cast speed.
Spell Totem: Spells cast by totem decreased from 30% less cast speed to 15% less cast speed.
Melee Physical damage on full life: Reduced mana cost multiplier from 130% to 110%.
Multiple traps: Increased from 40% less damage to 30% less damage.
Point Blank(gem): Increased attack speed by 10% across all levels.
Iron Grip(gem): Increased attack speed by 10% across all levels.
Slower Projectiles: Damage increased by 33% across all levels.
Faster Attacks: Increased mana cost multiplier from 115% to 130%
Cleave: Increased base damage from 80% to 95% and when dual-wielding from 60% to 70%
Spectral Throw: Reduced projectile damage gained per level from 3% to 1,5%.
Mana Leech(gem): Increased rate of maximum mana per second from 12.5% to 25%.