...I have no excuse for not getting Sapphire involved in this. She has experience with the ocean being mean, guys. She's got this. not

Except she'd need a temp partner. Out of her CR, are there any unpartnered Weapons interested in this mission? Are there any unpartnered Weapons in general that would be interested in this mission and willing to form a functional alliance with someone they don't know well? Getting Sapphire to ICly agree to this is easy, so her end is covered.