I challenged myself to play a game with 10diff sledge hammers on a ten planet map, starting in the middle connecting to all nine AI planets; survived 3K ships in an hour with fast forwarding. Shorthand tips:
- Salvage useless nuke silo for 10K energy.
- Disable power plants for efficiency.
- Spam basic turrets which cover more than one wormhole.
- Build basic starships to cap.
- Build fighters, research for II; build to cap.
- Don't build MK1 bombers or frigates; they're useless all from start to end unless you have a juggernaut economy. MK2 for both if you need it. Damage for bomber goes up from 200 to 900 and shield from 500 to 1 500, and MK1 frigate improves from 24K HP to 100K. You can't support that with the energy you have early game either, focus on higher tier ships. MK1 fighters are fine, they don't suffer from the same dullness.
- Don't always FRD your ships; always keep an eye out for large groups of enemy bombers and manually send your fighters to attack them. 300 MK1/2 fighters will easily handle a group of 100-200 bombers rapidly, even without attack boosts from starship.
- Research laser turrets. Versatile, long range, helps with bombers and shielded targets, especially melee ships. Boosts your defense line to a dual format so you catch those ships which may be resistant and resilient to a certain type of ammo fire.
- Do not waste all your knowledge on defensive tech. You need to expand later on, MK1 ships are useless on offense when AI has forcefields and MK2 ships.
- Do not be wasteful; be as efficient as you can. Avoid spamming all your turrets at once unless you have enough resources stockpiled.
- Don't forget rebuilder and engineer nodes, including FRD engineers. 10 rebuilders are fine, and five MK1 engineers are fair enough; watch your energy costs.
Example is a screenshot--see how I position all my turrets effectively, and the lack of tractors turrets. Only nine [each on one wormhole] because it is unrealistic that I try to build a ton on all of the wormholes, and the AI is bound to escape the wormholes anyways; that's what the turrets and mobile military is for. Always catch the early border aggression ships early on with a few tractors, or your economy will suffer.
I have my main mobile military on one side because I don't want to spread out my forces too thin--that's why I have way more turrets over on the other upper side.