those are the stats for a Knight mainly... knights also very good for mid-levels times like 60'ish to 80'ish, plus they are good for leveling if you dont have uber gear, since they have powerful skills and require not much SP use.
Crusaders can heal, but you need a good amount of job points to get the good skills and max them, Grand Cross and Heal mostly, ummmm having one berzebub clip helps A LOT in the casting time so those precious DEX points can be used to VIT points or INT.
Is up to you I think