Level 34 Inquisitor. Mostly in full groups. Grain Cellar, VOZ Orcs, various.
Problem 1: Reflecting Bash should be off GCD. I dont mind that it can only be triggered when a mob is casting but it needs to generally be available. If you take Uppercut or Jab from Rogues as a comparison, both of which are instant and off GCD and not in conflict with other abilities, the anti-magic tank is the worst interrupter.
Problem 2: Agro is too weak. It is wrong to say use mana - both by concept (groups dont want to wait for a tank as that tank then sticks out as inferior to other tanks) and because of the usefulness and cast time on the Distress skill itself. The Distress line is mana costly and even when you use it, agro is still weak. If Distress line needs to be essential to threat, then (a) make it cast more quickly; and (b) make it cost less mana. Otherwise, put more agro control back onto the 2/3 melee abilities
Problem 3: When tanking, cast time or channeled abilities can be interrupted. Its not like the Distress line is fast to cast; or the Attainder line is care free. I would put a channel skill boost in the Inq aura to compensate for the higher need to complete spells to function
Suggestion: On Arcane Aegis, have it act as a snare/debuff/fear cleanser as well. It can be used but doesnt properly do the job.
Suggestion: Remove dominate mind. Its cooldown is excessive and not thematic as it doesnt integrate with any other parts of the kit. Find another special use ability