Since I follow the XKCD theory of gaming, I'm just now playing through the Mass Effect trilogy.
I'm near the start of Mass Effect 2, and having recovered Garrus I now have the option to spend materials to upgrade the weapons systems on the Normandy 2. What sort of priority should I put on these upgrades? The existence of this option implies that there's some ship-to-ship combat in ME2, though there was none in ME1, but without any reference point I don't know if it's a good use of resources.
(Answer without spoilers if possible.)