She needs to get more familiar with the crew, especially Sympathy. Maybe she could see a storm on the horizon, or some kraken-like creature which in itself could be the cause of someone going overboard! Thus being saved by either herself or Clark or both? And Jack needs to teach her to play poker...and maybe how to drink...
Bruce
He needs more friends.
I would totally be cool with him flying overboard. Hulk meet sea monster?
Lois
She needs to get with Clark again (they need to talk about him being Superman).
Also, she is a good candidate for going overboard, she does have a knack for getting into difficult situations.
I'm sure she's great at cards, she is certainly a sly one when she wants to be.
Inque
Inque just needs to be more social in general. Throw ideas at me!