tools-that-lie-under-our-hand
It's not mostly what lawyers are for (she'll be answered if she says that part out loud), but it does come up. Especially in this office, because nailing down exactly what you want in enough detail for a contract to protect against malicious opponents is actually just hard. Even in Axis. There's a sense in which everything you are glad of being true, or would approve or disapprove of if it happened, anything you notice at all with more than indifference, is "an interest of yours." That sense doesn't usually matter, but it does if you're doing things like making hopefully-ironclad contracts with powerful entities. Only letting through things that are genuinely unimportant if they go wrong no matter how wrong they go can get uncomfortably close to listing off literally everything you care about.
But achieving something less stupid than giving up and banishing Cam, that's easy.
A contract would in fact have helped there. Agreeing on what types of actions and benefits-derived are within the scope of what conjurations would have prevented most of the problems that were likely to come up, including the ones that did. Obviously Cam was not behaving like a very contract-following type of person, but the other benefit of a contract is that it's at least more undeniable what is and isn't agreed to. "No fuckery" is not actually specific enough to call the kinds of things he did a breach.
And they do have more options for remedies, now. They've talked about liquidated damages and veto power over projects, but options other than suicide range from "just operate on separate continents" (if this breaks down in a way where Carissa is sure she wants to enable Cam but they can't stand working together for whatever reason) down through "comfortable cell where Cam can't do much except favors for vetted visitors" (if he is a threat to the world but would rather agree to confinement than be sent home). Everything is still ultimately backed by threat of Carissa's suicide, but in the kind of way where it's obvious there are other things both sides would rather try first.
Razmir. It sounds like most of the problems there have been with inability to trust Razmir, more than with Cam. (They can absolutely still get contract terms promising that Cam will not attempt to get Carissa Dominated or similar, of course.) Going for a headband early is a straightforward investment in resources, the kind of thing counterparties negotiate about all the time. That can start at the top of the list.
....would it help if they drafted a contract for dealing with Razmir? Safe conduct and usage restrictions on items from Cam are both simpler than the Cam situation. It sounds like Razmir and his people were already on that, but if you're worried about loopholes it's safer to be the party putting words to paper.
(And if she wants to undercompensate resurrectees from Hell, that's even easier. A footnote. Very good off-the-shelf magic items can in fact be found on shelves, and ones even better than that just mean buying more of Razmir-or-whoever's time.)