AP Shaco top against Camille is actually fucking hilarious
Ignore her altogether and don't duel her.
Farm and E spam poke her down.
Place boxes along the bushes and edges of walls where minions won't trigger but Camille will if she Es to said wall. Immediately Fearing her and thus preventing a quick E2 use.
Ult if she tries to ult, watch it randomly poof out and fail.
Can Q out of her Q/W/E/R cast ranges if needed.
Can Q away from ganks.
Can place boxes in bushes to slow down jungler gank attempts.
Her not hitting you with W means her sustain is a lot weaker, while the E inversely increases in power due to missing health scaling over continuous spamming.
Taking Exhaust/Ignite for double cheese is fun too, just to completely ruin her sustain or power in team fights as well, or the occasional unlucky caught-out moments.