I have come back from a long layoff of the game and I was curious about mods. As you level, which stats should you emphasize? For example, my op is in the 40s now and when I got to upgrade mods I am not sure if I should just go for mastery, crit and power or if accuracy matters before endgame? There are a multitude of good guides for the classes but none ever address this and I am hoping that some of the SWTOR experts can fill me in. Thanks!

I am back after a long layoff and was curious about the 2X XP weeks. How often do they come around?