The Yin Brotherhood
I call these guys the sickos (They remind me of that race in Star Trek where they are all diseased). The Yin Brotherhood is another great race if played right. They have some strange abilities including a first strike of 5+ to steal a ground force from any planet you are attacking. They also have the ability to sacrifice a destroyer or cruiser in order to inflict damage to an opponents ship. Once per turn they can also select a planet and reverse it’s influence and resources. They do start with two carriers so this is one less thing you need to worry about first turn.
If you have a War Sun next to you and want to attack make sure you have that action card which allows you to make a kill once the War Sun is damaged. Roll your one round of combat, sacrifice a destroyer and then play that card. Pow no more War Sun. You will want to try and get as many action cards as you can so that your chances of drawing that card go up. Taking over planets can be fun too. Of course you want to roll above a 5 for that first round so that you can steal a troop but the result is worth it when it works.
If you see a high influence planet in your realm reverse the stats and use the resources. This can be very handy but don’t forget to use this ability. Many forget that they even have the skill. Go for whatever tech you want since you don’t start down a designated path.