I believe personally if you wanted this you should make the ‘Fleet of Lords’ where there’s ten waves but four flagships at the last 4 waves with a sloop or galleon with them while the first 6 waves alternate between two galleons and three sloops for difficulty
Now the interesting part is that these will drop even higher loot when a ship is sank there’s a guaranteed 2 to 3 storage crates per ship and sloops will drop Athena trinkets and their usual haul upon sinking all 3
Galleons will drop 3 ritual skulls and 4 storage crates along with the loot from 2 galleons this will encourage a major fight for loot
Finally the 4 flagships will drop their normal haul of a flagship in wave 7 double in 8 and 9
And a very large some of loot consisting of reapers bounties and Athena loot on wave ten