Hmmm. Since it is more a gesture for the new leader than anything else, it probably should not be something behind closed doors. Although no doubt there will be such discussions as well. They have to at least APPEAR to be making the effort, even if it was not enough in the end I think.

Given that, and the nature of vampires themselves (being super oldschool etc) perhaps a one-day battle and/or something very structured and antiquated, like an old duel? (JC totally calls dibs on Lance if this works as an idea for you lmao)