At any rate, looking more closely at the stats offered by the datacron, it seems like armor/resistance ones are better rolls than damage just based on the percents offered. If I can get a minimum of 75% armor for example, that's at LEAST an increase of a few hundred points of flat armor, which translates into thousands of points of offense. If the offense values are only offering 10-20% increases, then even with 8,000 offense, you would get only an 800-1600 point increase.
I think the question does come down to whether the types of defense get mapped to the type of offense. I suppose I could just reroll and see what's offered.