Blurbs now have guides as to how affective something is, these systems are estimations and thus they are not exact. Each column should be read separately against the rating column, as you can see from the examples.
The abbreviations for the main stats are:
AR = Armour D = Damage HS = Hit Skill HE = Health SP = Speed MR = Magic Resistance R = Range
Not every abbreviation is appropriate for every column, if this is the case NA will be used, as for Not Applicable.