[X] Offer to help as you can in the war the Council is fighting, you have no qualms that the Red Court is an evil that must be defeated at all costs after what you have seen today
[X] Offer to help in the Council's war. You managed to kill one of those things, and apparently that's a big deal... and it wasn't particularly difficult for you. All you're saying is - you want to help, and you think the Council needs that help, at least when it comes to fighting whatever those were.
[x]Approach theme 1: You can't do normal magic any more but you don't need black magic induced madness to go mad with power, it just helps and you still have power as the dead outsider demonstrates.
-[x]Approach Theme 2: Rosie didn't deserve what you did, and even if you could theoretically fix it, that would likely open up other ethical issues/rub salt on the wound.
-[x]Offer to work with them, either with swords against the red court/outsiders or just spreading awareness of the dangers of black magic