The amount of exploration we have to do, and the fact that it's only going to get worse the more areas we uncover, is what makes me want the scanner boosts in the first place. The sooner we can get scan bonuses mounted, the sooner we can start trying to tackle that overwhelming amount of scan opportunities. The Revelation Class scanner itself is a GodTek derived component that's described as "revolutionizing our ability to explore," and in actual mechanics it looks to be the way, or at least the start of one, we can scan multiple objects at the same time.Upgrading scanners is possibly the most unnecessary option there is. Seriously , they are already good enough. We can afford to scan something multiple times (since scans only open new variants of action , and we are already overwhelmed by them. For example , Gestalt Protocol was possible since the first turn , and wasn't done yet and it is unclear if it will ever be) , this is clearly not the priority. On the other hand Toxel doctrine , which is crucial to our future military efforts could disappear at any moment. And the Repair protocol , which could fix the biggest problem with warp jps we have , so the don't need to spend everything on wards , Antianima translation , etc.
If you don't want to take the second option , you could use EXP for an amazing Self-Optimizing Electronics Production. The only issue with it is the use of LM , but since there is an EXP option that generates 2 for only 10 points , that is not really the problem.
Your CUL actions are ok (except for Antianima , we don't need if we take Repair Protocol) , but Sleepwalk Brew is still the best option ever
I don't see why military ship is necessary now. And when we actually build it , we should probably do it with ship upgrades already taken (hypermodular power bay , better weapons , drives , shrines , shipbrain , self repair ans so on) , so we wouldn't have to keep it in the docks every turn to implement them one by one
As for why I want to start building the Valiant now? Because I want one ready and done before we think we need it so that it's available to use the moment we do, and with how long the thread dragged it's heels on getting even a normal exploration ship and warp drive I don't have very much faith in getting one out in a reasonable time frame when there are (admittedly extremely cool) high EXP options like the Great Space Express on the table if we don't at least start it now.
I would just prefer to spend 40 EXP over a couple of turns now for a warship that may just end up puttering around doing nothing if we get very lucky, than have to deal with the aftermath of not having a warship in 40k when we really needed one.