the str line has good buffs from the pet wich help out the group mainly.One increases attack speed by 16% if full,another has a 24% chance to cast a ward on nearby allies(if full also),and the last one(wich is good for raids)grants a non-diect AOE immunity,and a 15 percent chance to cast it on group members aswell.Since the mystic is more of a team player,that line suits the class well.The other lines arent bad,usually raid mystics choose str line though.
Edited, Aug 29th 2007 9:25pm by Ojeki