I normally build the second science ship immediately but I'm curious to see if there is more that I should be doing to give me more of an edge over the AI rivals.
I find building a single society research station or lab is more effective that this. Even just a +2 society is already a 40% increase in society research speed.I always immediately go to my policies and edicts and enable Free Thought and Society Research grants. It makes the colony ship tech finish a lot sooner and at that early stage of the game Ethics Divergence doesn't do anything and there aren't many things to spend influence on. While colony ship is researching, I prioritise mining stations and networks and corvettes, only building enough power plants to keep my energy income above 0. Once I'm only a few months away from colony tech, I start saving up for that.
Once that's researched, I turn society grants off but leave Free Thought on for as long as I can. I usually only disable that once migration treaties/conquered pops/remote colonies start coming in and divergence becomes a problem.
In Banks colonisation will be a starting tech so I'll probably remove society grants from my build order. Not yet sure when I'll go for my first colony ship now that research no longer determines the timing. I'll also have to think what society tech to prioritise instead of it... But probablish won't change my production queue.
When should I start military campaigns though, or is it even worth it early game? the AI is seemingly able to pump out corvettes like nobodies business even if I have more resources then they.
Yes, that's a good alternative assuming that you can find some research or a pre-FTL civ within your starting space. I do still prefer the edicts when RNG can't be relied on because there's practically no downside to them for the first couple of years. I also do like to have a strong mineral income as early as possible. But I do agree with building a planetary lab at some point early on, assuming I have enough pops to work it without taking anyone off minerals or food.I find building a single society research station or lab is more effective that this. Even just a +2 society is already a 40% increase in society research speed.
Personally i just annihilate first two or three neighbors i encounter asap by going 3-4 planets(only to be able to build spaceports to decrease maintenance cost of my corvette-rush since port provide additional limit) and then going 200%++ ship-overlimit (saving minerals and then spending them at once at several spaceports saves mush mineral since you dont have to have overlimit maintenance penatly for too long) to be able to deal with both enemy fleet and spaceport at once.I normally build the second science ship immediately but I'm curious to see if there is more that I should be doing to give me more of an edge over the AI rivals.
I personally recommend not starting any wars at least until your have destroyers, if for no other reason than to have the firepower to take on space stations. In comparison to other empires, spending a little time early on not building military ships (thus saving you minerals from the construction and minerals/energy from the maintenance) allows to to colonize and expand economically much faster. By the time neighbors decide to declare war, you can so far outproduce them that you can stall for time to build up a winning doomstack.