suggest for increase general score

hi guys any question could be posted even here
will be a pleasure help you and share any kind of suggest

1 ballista ship\\\ 1 mortar ship
attack power=15 \\\ attack power=54
defend power=17 \\\ defend power=108
gold for upkeep=14 \\\ gold for upkeep=50

200 ballista ship \\\ 56 mortar ship
attack power=3000 \\\ attack power=3024
defend power=3400 \\\ defend power=6048
gold for upkeep=\\\gold for upkeep=2800

1 Flame-thrower \\\ 1 diving boat
attack power=39 \\\ attack power=142
defend power=17 \\\ defend power=56
gold for upkeep=20 \\\ gold for upkeep=50

150 Flame-thrower \\\ 60 diving boat
attack power=5850 \\\ attack power=8520
defend power=2550 \\\ defend power=3360
gold for upkeep=3000 \\\ gold for upkeep=3000

SO GUYS AS U CAN SEE WITH THE SAME UPKEEP BUT WITH MINOR NUMBER OF UNIT ,YOU GET MORE DEFEND POWER IN CASE OF DEFEND SHIP AND YOU GET MORE ATTACK POWER IN THE CASE OF ATTACK SHIP
SO IF YOU HAVE A LOT BALLISTA SHIP AND NO ONE MORTAR SHIP DISMISS THE BALLISTA SHIP AND BUILD THE MORTAR SHIP SAME FOR FLAME TROWER DISMISS IF YOU DON’T HAVE ANY DIVING SHIP FOR DIVING SHIP IS REQUIRED PRESSURE CHAMBRE