Stats, or attributes, are numeric characteristics that describe the properties of a character.
You can see what basic stats various combinations of jobs and subjobs would have, by using a Stat calculator.
Enemy attributes (translated from Studio Gobli)
Like for PCs, you can calculate them with
Race Ranking + Main Job Ranking + Support Job Ranking * Support Job Revision
Unlike PCs, the growth does not decline at high level (past 61?)
SJ revision is 0 at low lv. From Lv.30, SJ revision is 0.5 (half of main), but depending upon the area it differs even between monsters of the same level.
Most monsters are WAR/WAR.