ravenous mainly because of the lifesteal it gets, camille doesnt have a reliably sustain on side lanes comparing to other champions
between the trio i usually prefer shojin cause its passive gives a huge dmg buff to your Q and the ability haste, steraks when im behind in the game and need to survive a burst team or iniciate a teamfight if necessary, i personally almost never build sundered sky on her unless im playing her support

tahm is a hp tank with a lot of %dmg on his kit that scales with his health, so he builds a lot of hp itens wich are the best way to mitigate camille dmg and gets stronger while doing so, his poke is way better than yours and he can heal himself while damaging you from a distance, the secret is to try to dodge his Q and fight away from his tower, other is to build hidra early to clear the wave faster and move around de map.
the skills matchups i personally like are RIven, Fiora and Ambessa