I'm not sure I'd do very good as a co-GM, but I'll accept it if you think I'm good for it. Everyone RP I've GMed never really ever got off their feet, so if you're willing to risk bad luck, go ahead.
As for 1000 soldiers- that might actually be too little.
1) You'll need sizeable forces to send at an enemy. If I have a fleet of 20 ships, that may be enough to have at least one or two guns for every one of your fighter things.
2) Only the most foolish would launch most everything in their attacks. If you use purely fighters, it's more likely that you'd keep at least half around you for protection. They can be replaced, but the Queen cannot, correct?
I'd like to request that the Hocklyn Slaver Empire is new to the Stellar Dominion- didn't participate in the First War. That way, no one- likely not even the Stellar Dominion- would know the location of their homeworld or even very many of their planets. This way, just bombarding the surface won't be an option- anyone who has a military mind and wants to free and conquer the Slaver Empire will want information, which can be found by infiltration of ground facilities. For the sake of epic drama, I would also say that the data is in the form of a highly encrypted data device that would have to be manually retrieved, not just transmitted or anything.
Being new to the intergalactic scene would both be cause for other nations' wariness, and perhaps reluctance to attack a new, unknown civilization, and care, since if they end up winning and digging into Dominion Space, they may just knock out the few worlds that might have information about the Hocklyns' whereabouts, and they may come back to bite you in the ass because you had to spend years searching for them, while they knew where you were all along.
The Queen isn't even in the system. That's the beauty of Quantum entanglement communications. She could be in another galaxy, another dimension, traveling through time, etc, and still command that battle. In actuality, she will be sending her Mates in as generals (until she gets Vassal Queens by giving them territory she conquered), and sending them orders from interstellar space hundreds of lightyears away. My first Queen will be relatively new, though, so she will only have a few mates (gifts from her mother and aunts), and will only be able to lay 80 or so eggs per month to replace her troops. She'll set up in an uncolonized system, then wage war from there, sending fleets into battle as she creates them.
As for your number of ships, if you have 20 ships, I'd also have that many or more, considering my stats are lower. That would mean that I can launch 6 missiles from all 1000 fighter ships at each of your capital and above ships, and use Tools on soft targets while I wipe out your fighters. True, I'll lose insane numbers of fighters, maybe 80% casualties per battle, and you'll shoot down most of the incoming missiles, but 6000 projectiles at once should be able to overwhelm a Point defense system, especially if launched at high speed and close to your ship, towards a common point. The PDS can only track so quickly, and only fire so quickly as well.
That's also why I added the Crusher Hives, to send more powerful missile your way when the PDS starts to break down.
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Other than that, The Sisterhood didn't meet them until a few months ago. They destroyed two fleets that tried to capture one of their systems, and Kekli (My Queen) realized that a direct assault against them would fail unless at least two sisterhoods teamed up to take them on. She sent messages to their leader, informing him that she believed the two who attacked him were fools, and offering him a treaty with her. She managed to get several other members of her Sisterhood to join the deal as well, and a deal was struck. They would work together to conquer the Dominion's mutual enemy.
Kekli agreed, knowing that the systems she would gain from it would strengthen her and her Sisterhood enough to conquer the Dominion when the time came, and the Male who lead it inevitably betrayed her.