The minimum number of points you need for this to unlock is 12 split into two different talents so either:
6 Might 6 Sorcery - Guardian Destiny
or
6 Might 6 Finesse - Duelist Destiny
or
6 Finesse 6 Sorcery - Disciple Destiny.
Once you have completed all your skill points, talent points, etc and finished the leveling up process, this trophy should unlock.
It is also possible to unlock the "Jack Of All Trades" trophy at the same time, assuming you have a minimum of 2 points in all 3 tracks (Might, Finesse and Sorcery). Also note that you do not need to select the Destiny, just having it unlocked as an option nets the trophy.