I use the following to instant spawn fleets to test ship designs and fleet compositions.

This is also a good way to see what types of Leader attributes work best for your ship designs. If you add Leaders to the fleet, Make sure both fleets have a leader. If not interested in how leaders affect the battle - then remove all fleet leaders

1. start a new game with 0 empires

2. in the console type these commands in the order shown.
(Using the following order of commands in the console will give you 1 million of each resource)


research_all_technologies
instant_build
max_resources

3. PAUSE THE GAME (Spacebar)

4. Design ships you want to test

5. Go to your station and add all the ships you want in a fleet

6. UNPAUSE THE GAME (spacebar) - The game instantly build all the ships.

7. Move the first fleet off to the next door solar system (otherwise they will attack the station)

8. PAUSE THE GAME - Design more ships if you want to test against specific designs

9. UNPAUSE THE GAME - Go back to the station and instant build another fleet

10. Move the second fleet to the same solar system as fleet one

11. select and move each fleet and separate them so they have to approach each other (especially important if testing ships with hanger bays for fighters or X slot weapons)

12. PAUSE THE GAME - Make sure the empire has max resources
if Not use the Instant_build and max_resources commands

13. slow down the game to slowest speed (minus key on keypad). (this is so you can watch the performance of your designs).

14. then use the command
attackallfleets


PAUSE THE GAME
1. Design the Titan

2. Make the name of the Titan "T1"

3, Design the Flagship

4. Make the name of the Flagship "F1"

5 Open the console

6. place your mouse cursor where you want the ships to appear

7. Type in the Console (for each time you add a Titan)
add_ship T1

8. Type in the Console (for each time you add a Flagship)
add_ship F1

UNPAUSE THE GAME
9. Join the Titans and Flagship(s) to the fleets you want them in

10. use the attackallfleets command in the console