In my first play through on moderate difficulty as Purity and guy whose name starts with B with four opponents large galaxy, so take this for what it is worth. The game ended so quickly I don’t think knowing all the synergies with planets mattered. Once I had five planets my fleet was strong enough to crush the other AIs.
For some reason I thought you could only have four capital ships so I maxed them out.
I will try hard setting next and maybe knowing which planets to specialize will be necessary.
This is a fun game for what it is. A brief summer fling.
Playing this makes me want to try SM’s Ace Patrol.