Victor isn't all that dangerous (only Holy does a lot of damage) and even Curada doesn't heal Victoria by all that much, so get rid of Victoria first.
As for beating her, I really just used strong physical attacks. I had a setup of: Ninja, Ninja, Swordmaster and Knight. I don't think I bothered with magic on her at all. Also helps to have Poison Immunity (Freelancer skill) and something that can nullify Death and Dread.
Hmm victor isn't really a problem. Victoria however is with her poison and extermination and her magic healing ability. Focus on killing her with physical moves. For her poison, i had a salve-maker and always used the heal all ability with antidote.
I've never had trouble with Corpse as long as I have two revivers. I suppose you could get unlucky and have two people die at once but, that can easily be solved by overbraving. Reraise is definitely not needed.
With each passing day, the world finds new and exciting ways to kill a man.-Balthier FFXII Want Dittos? Can't find a safari? PM me for free 2IV ones.