Just to clarify, Antonius is going to try and fill Rinack's skull with pure magical energy, thus exploding it. I've had it so Imperial Wizards can't use offensive spells, but mind control is still allowed. Rather than control Rinack, he wants to bridge a connection, and then let his power fill the warlock's brain to the point it ruptures and explodes. 

Brutal. 

But, the Imperial Wizard is Rinack's inferior, if the two went head to head at full strength, then Antonius would lose by a long mile. So you know, play it how you want.