This requires a Tier 2 hybrid destiny. As soon as it becomes available at level 4, save the game and go to a Fateweaver. Place your ability points in one of the following options, then reload the saved game after earning "Some of This, Some of That" and reallocate them as desired.

Disciple destiny: 6 Finesse and 6 Sorcery.
Duelist destiny: 6 Might and 6 Finesse.
Guardian destiny: 6 Sorcery and 6 Might.