My thoughts...
Bandaid fixes for now;
• The Blackest Night, trigger dark arts on hit, refund portion of mp if shield popped
• Carve and Spit/Abyssal Drain, reduce CD to 30, give 2 charges adjust potency accordingly, C&S increase mp restored, AD remove mp restored & increase hp restored

Further fixes for now;
• Dark Mind, 10% damage reduction, if hit by Mag Atk during, damage reduction changed to 20% and extend duration
• Dark Missionary, 10% damage reduction, if hit by Mag Atk during, adds hp regen