These combos have been done before, but I didn't see them in the same fleet here. The premise is to have 2 Mercenary gold runners in one 40 point fleet.
The Slipstream has 4 cargo spaces open between the abilities and links, and can unload near home despite the Mercenary keyword. Before play begins, ask your opponent if they're willing to go to 41 points. This can allow you to swap the oarsman for a helmsman.
The other gold runner is the Devil Ray, but she needs to have the Mercenary keyword cancelled in order to dock home her gold. Therefore, we have the Mobilis as well. The Mobilis can act as a HI guard ship while the others are out and about, and can escort them on the first and final parts of their journeys.
Clearly this isn't remotely competitive, but shows the Mercs have something they can do about their gold conundrum. Although there's almost no combat capability, three submarines that are often submerged is pretty tough to deal with at 40 points, and throw in submerged ramming and the Mobilis' cancelling, and you've got enough to possibly survive and not get shut out! XD