I think Sardonyx's problem is that in the current meta he needs arcane support to effectively deal with his weaknesses. Enfeeble? Dispel. Disperse. Seeking Dispel. Banish? Nullify. Jinx. Arcane Ward. Enemy Mage tries to run away? Teleport. Teleport trap. What the dark school has going for it are Wall of Bones, Enfeeble, Chains of Agony and reassemble. I think it's been said in a Mage Wars Mondays podcast (dont remember which episode) that the sorcerer will be arcane/dark. That is the ideal training for a sardonyx build, I think.