Apparently the prologue gives you a bunch of Damaged mods. I was wondering why my mod for Vitality was already maxxed out. It's because it was the Damaged version. So I've wasted several of the normal Common versions. At least 50% of the energy from the Damaged one will go to upgrading a Common when I get it. I've probably had quite a few I've made this mistake with but won't moving forward and will slowly replace all the Damaged versions with their normal Common/Uncommon/Rare counterparts. I'd post something about this on the official forums for the game but it keeps asking me to login.