Like I said to Terabat the situation between what I've done to Erimond and what happen in Kirkwall is completely different. It's irrelevant to even compare the two considering the fact that Erimond is guilty for committing war crimes against the Grey wardens, and for working with Corypheus (Being a Venatori). He is guilty of summoning Corypheus' dragon (Using magic to do it) to kill the inquisitor, and by doing just that ended up murdering Warden-Commander Clarel. He had demonstrated to me (As a mage inquisitor) that he is not responsible for having the talent of wielding magic.
The basic point that I'm making is that from my own Inquisitor's viewpoint, the decision is not really about him at all. He can cackle maniacally until his throat is sore and twirl his mustache until it falls off his face, but none of that matters. The only thing she cares about is the precedent. In that sense, the scope of his crime is not a factor. It doesn't matter if it's a "war crime" or a heinous act against a single victim. And it's also in this sense that I consider the use of the Rite of Tranquility in Kirkwall and its use against Erimond one and the same. My Inquisitor is completely unmoving in the idea that it should be used strictly as an act of mercy to save someone from their magic in very extreme circumstances, and never against anyone else, no matter how severe their crime, because again, it's not about Erimond, it's about all mages. My Inquisitor's own words when taking up the role was that it's not about sending a message, and I'm pretty much applying it to everything, because I find little value in that sort of thing.
Magic exists to serve man, and never to rule over him.
Foul and corrupt are they
Who have taken His gift
And turned it against His children.
They shall be named Maleficar, accursed ones.
They shall find no rest in this world
Or beyond.
-Transfigurations 1:2
While my Inquisitor (even the mage) doesn't give two bronto cheeks about the Chantry, this can be interpreted in any number of ways, especially if RP'ing a mage. I see nothing here that supports the use of the Rite, only a code of moral principles meant to promote discipline, responsibility and humility.
I'm not against capital punishment, but for the sake of this debate I will talk about it. The pro lifers believes that giving the death penalty is cruel and inhumane and causes pain on an individual, and for that reason they're trying to abolish the death penalty. You strongly disapprove of giving the Rite to this man yet support his execution. Doesn't that support gruesome violence against a fellow human being? Instead of forcing this man to become productive member of society by taking the very essence that is the root of his troubles, you instead would rather spill blood by viciously executing the man by decapitation.
Erimond reaction over the decision of making him tranquil seems justified to me. I didn't give him what he wants. Instead I gave him life at the cost of eliminating his magic talents with the side effect that he himself forfeited when he committed his crimes against the people of Thedas.
This is basically what it boils down to for me: Erimond is of no significant use in any capacity, is totally unrepentant of his crimes, and any resources used to keep him alive other than what was expended to bring him before the throne is unacceptable. It's the reason why Alexius serves the Inquisition as a researcher, and he gets nothing but the blade. Making him tranquil doesn't create a productive member of society; it creates an automaton to be used by other people, and I won't have it. So the only options I'd ever consider are handing him over to the Wardens to let them have their way with him (which is essentially just a slower more painful death) or chopping his head off myself. Either solution is no skin off Inky's back.
I don't care what he wants, and even this is debatable. More than likely he prefers to live, but simply squanders his last moments posturing. It's the same idea behind my Inquisitor telling Corypheus that she's not afraid. Only crazy people are totally unafraid, so it was obviously a lie, but irrational words are a natural response to extreme situations. In any case, the threat is neutralized without special treatment that may set any dangerous precedence, and that's all I care about.