As for culverin of Maltese, it is too OP that they can get benefit from 2% hp from each shipment. After 8 shipments, their hp will be more than 320, which means other culverins need to take 3 shots to kill them, while they only need 2 shots to kill other culverins.
That’s really unreasonable and unfair. Maybe we can balance them by preventing artillery from benefiting from 2% health, or give them an upper limit.